Remove AST node self pointers by jakebailey · Pull Request #4903 · microsoft/typescript-go

Jake Bailey (jakebailey) · 2026-08-14T03:04:28Z

I feel less bad about this now with AST code gen limiting the unsafe to generated code only

Jake Bailey (jakebailey) · 2026-08-14T06:35:48Z

TypeScript Bot (@typescript-bot) perf test this faster

typescript-automation · 2026-08-14T06:35:54Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`perf test this faster`	✅ Started	👀 Results

typescript-automation · 2026-08-14T07:06:16Z

Jake Bailey (@jakebailey)
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{Compiler-Unions - native}
_Errors	₄₁	₄₁	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_115,480	_115,480	_~	_~	_~	_{p=1.000 n=12}
_Types	_96,945	_96,945	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{149,289k (± 0.47%)}	_{141,239k (± 0.49%)}	_{🟩-8,050k (- 5.39%)}	_139,594k	_143,281k	_{p=0.000 n=12}
_{Memory Allocs}	_{2,247,476 (± 0.00%)}	_{2,247,553 (± 0.00%)}	_~	_2,247,283	_2,247,792	_{p=0.347 n=12}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.042s (± 4.25%)}	_{0.037s (± 3.32%)}	_{🟩-0.004s (-10.22%)}	_0.034s	_0.040s	_{p=0.000 n=12}
_{Bind Time}	_{0.011s (± 6.71%)}	_{0.014s (±13.59%)}	_{🔻+0.003s (+30.53%)}	_0.011s	_0.020s	_{p=0.000 n=12}
_{Check Time}	_{0.508s (± 0.55%)}	_{0.532s (± 0.88%)}	_{🔻+0.024s (+ 4.73%)}	_0.520s	_0.547s	_{p=0.000 n=12}
_{Emit Time}	_{0.267s (± 1.53%)}	_{0.281s (± 1.81%)}	_{🔻+0.014s (+ 5.25%)}	_0.266s	_0.295s	_{p=0.000 n=12}
_{Total Time}	_{0.834s (± 0.69%)}	_{0.871s (± 0.86%)}	_{🔻+0.037s (+ 4.44%)}	_0.853s	_0.897s	_{p=0.000 n=12}
_{angular-1 - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_{847,149 (± 0.09%)}	_{846,284 (± 0.13%)}	_~	_843,929	_848,804	_{p=0.266 n=12}
_Types	_{249,914 (± 0.00%)}	_{249,912 (± 0.00%)}	_~	_249,911	_249,914	_{p=0.604 n=12}
_{Memory Used}	_{793,255k (± 0.07%)}	_{735,594k (± 0.04%)}	_{🟩-57,662k (- 7.27%)}	_735,053k	_736,312k	_{p=0.000 n=12}
_{Memory Allocs}	_{13,042,458 (± 0.06%)}	_{13,036,083 (± 0.03%)}	_~	_13,030,096	_13,048,304	_{p=0.291 n=12}
_{Config Time}	_0.016s	_0.016s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.277s (± 1.61%)}	_{0.268s (± 1.96%)}	_{🟩-0.009s (- 3.28%)}	_0.254s	_0.282s	_{p=0.009 n=12}
_{Bind Time}	_{0.062s (± 6.38%)}	_{0.070s (± 9.00%)}	_{🔻+0.009s (+13.78%)}	_0.065s	_0.094s	_{p=0.000 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_{1.639s (± 0.76%)}	_{1.688s (± 1.67%)}	_{+0.050s (+ 3.02%)}	_1.652s	_1.796s	_{p=0.000 n=12}
_{Total Time}	_{2.010s (± 0.79%)}	_{2.059s (± 1.78%)}	_{+0.049s (+ 2.41%)}	_2.011s	_2.198s	_{p=0.002 n=12}
_{mui-docs - native}
_Errors	_{11,275 (± 0.04%)}	_{11,277 (± 0.04%)}	_~	_11,258	_11,282	_{p=0.199 n=12}
_Symbols	_4,313,827	_4,313,827	_~	_~	_~	_{p=1.000 n=12}
_Types	_1,641,392	_1,641,392	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{4,907,708k (± 0.02%)}	_{4,857,606k (± 0.03%)}	_{-50,103k (- 1.02%)}	_4,853,461k	_4,860,566k	_{p=0.000 n=12}
_{Memory Allocs}	_{50,069,481 (± 0.03%)}	_{50,082,521 (± 0.03%)}	_~	_50,035,457	_50,119,903	_{p=0.291 n=12}
_{Config Time}	_{0.016s (± 2.08%)}	_{0.015s (± 2.10%)}	_~	_0.015s	_0.016s	_{p=0.684 n=12}
_{Parse Time}	_{0.551s (± 1.92%)}	_{0.539s (± 2.32%)}	_~	_0.501s	_0.563s	_{p=0.213 n=12}
_{Bind Time}	_0.002s	_{0.002s (± 8.72%)}	_~	_0.002s	_0.003s	_{p=1.000 n=12}
_{Check Time}	_{17.248s (± 0.32%)}	_{17.382s (± 0.17%)}	_{+0.135s (+ 0.78%)}	_17.321s	_17.457s	_{p=0.000 n=12}
_{Emit Time}	_{0.443s (± 1.65%)}	_{0.462s (± 2.57%)}	_~	_0.434s	_0.476s	_{p=0.069 n=12}
_{Total Time}	_{18.999s (± 0.41%)}	_{19.109s (± 0.29%)}	_~	_18.989s	_19.265s	_{p=0.050 n=12}
_{self-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,394,411	_1,394,411	_~	_~	_~	_{p=1.000 n=12}
_Types	_443,627	_443,627	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{1,638,126k (± 0.38%)}	_{1,521,834k (± 0.32%)}	_{🟩-116,292k (- 7.10%)}	_1,506,565k	_1,532,739k	_{p=0.000 n=12}
_{Memory Allocs}	_{96,881,454 (± 0.05%)}	_{96,861,156 (± 0.03%)}	_~	_96,789,155	_96,909,635	_{p=0.378 n=12}
_{Config Time}	_{0.003s (± 9.29%)}	_{0.003s (±18.68%)}	_~	_0.002s	_0.005s	_{p=0.774 n=12}
_{Parse Time}	_{0.197s (± 2.15%)}	_{0.189s (± 2.26%)}	_{🟩-0.009s (- 4.36%)}	_0.175s	_0.199s	_{p=0.008 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.827s (± 0.40%)}	_{1.961s (± 0.42%)}	_{🔻+0.133s (+ 7.30%)}	_1.940s	_1.986s	_{p=0.000 n=12}
_{Emit Time}	_{0.299s (± 4.64%)}	_{0.288s (± 5.54%)}	_~	_0.260s	_0.331s	_{p=0.259 n=12}
_{Total Time}	_{25.222s (± 0.72%)}	_{26.384s (± 0.52%)}	_{🔻+1.162s (+ 4.61%)}	_26.133s	_26.829s	_{p=0.000 n=12}
_{self-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_337,618	_337,618	_~	_~	_~	_{p=1.000 n=12}
_Types	_198,941	_198,941	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{319,618k (± 0.03%)}	_{300,337k (± 0.02%)}	_{🟩-19,281k (- 6.03%)}	_300,168k	_300,578k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,661,002 (± 0.01%)}	_{4,661,087 (± 0.01%)}	_~	_4,660,267	_4,662,832	_{p=0.887 n=12}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.116s (± 4.83%)}	_{0.113s (± 4.83%)}	_~	_0.099s	_0.126s	_{p=0.284 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.064s (± 0.75%)}	_{1.137s (± 0.45%)}	_{🔻+0.073s (+ 6.86%)}	_1.124s	_1.153s	_{p=0.000 n=12}
_{Emit Time}	_{0.155s (± 6.83%)}	_{0.137s (±13.19%)}	_~	_0.105s	_0.178s	_{p=0.164 n=12}
_{Total Time}	_{1.386s (± 1.00%)}	_{1.444s (± 1.19%)}	_{🔻+0.058s (+ 4.16%)}	_1.404s	_1.492s	_{p=0.000 n=12}
_{ts-pre-modules - native}
_Errors	₈₇	₈₇	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_305,341	_305,341	_~	_~	_~	_{p=1.000 n=12}
_Types	_182,038	_182,038	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{277,323k (± 0.01%)}	_{261,059k (± 0.02%)}	_{🟩-16,264k (- 5.86%)}	_260,975k	_261,192k	_{p=0.000 n=12}
_{Memory Allocs}	_{1,628,133 (± 0.01%)}	_{1,627,970 (± 0.01%)}	_~	_1,627,661	_1,628,354	_{p=0.078 n=12}
_{Config Time}	_{0.000s (±146.91%)}	_{0.000s (±146.91%)}	_~	_0.000s	_0.001s	_{p=1.000 n=12}
_{Parse Time}	_{0.102s (± 5.25%)}	_{0.099s (± 3.52%)}	_~	_0.091s	_0.106s	_{p=0.369 n=12}
_{Bind Time}	_{0.037s (±10.48%)}	_{0.042s (± 7.56%)}	_~	_0.037s	_0.054s	_{p=0.080 n=12}
_{Check Time}	_{0.844s (± 0.79%)}	_{0.894s (± 0.64%)}	_{🔻+0.050s (+ 5.94%)}	_0.886s	_0.915s	_{p=0.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.998s (± 0.62%)}	_{1.049s (± 0.76%)}	_{🔻+0.051s (+ 5.08%)}	_1.029s	_1.075s	_{p=0.000 n=12}
_{vscode - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_7,677,900	_7,677,900	_~	_~	_~	_{p=1.000 n=12}
_Types	_2,642,005	_2,642,005	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{5,183,524k (± 0.02%)}	_{4,903,833k (± 0.01%)}	_{🟩-279,691k (- 5.40%)}	_4,902,111k	_4,905,891k	_{p=0.000 n=12}
_{Memory Allocs}	_{40,261,572 (± 0.01%)}	_{40,262,669 (± 0.01%)}	_~	_40,258,123	_40,270,622	_{p=0.178 n=12}
_{Config Time}	_{0.061s (± 0.47%)}	_{0.061s (± 0.30%)}	_~	_0.060s	_0.061s	_{p=0.590 n=12}
_{Parse Time}	_{1.588s (± 1.29%)}	_{1.465s (± 2.07%)}	_{🟩-0.122s (- 7.70%)}	_1.399s	_1.568s	_{p=0.000 n=12}
_{Bind Time}	_{0.327s (± 0.42%)}	_{0.361s (± 0.26%)}	_{🔻+0.034s (+10.39%)}	_0.360s	_0.364s	_{p=0.000 n=12}
_{Check Time}	_{9.863s (± 0.08%)}	_{10.146s (± 0.07%)}	_{+0.283s (+ 2.87%)}	_10.128s	_10.169s	_{p=0.000 n=12}
_{Emit Time}	_{2.909s (± 0.80%)}	_{3.098s (± 2.20%)}	_{🔻+0.189s (+ 6.49%)}	_3.009s	_3.412s	_{p=0.000 n=12}
_{Total Time}	_{14.823s (± 0.21%)}	_{15.206s (± 0.63%)}	_{+0.384s (+ 2.59%)}	_15.047s	_15.646s	_{p=0.000 n=12}
_{webpack - native}
_Errors	₂	₂	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,380	_1,380	_~	_~	_~	_{p=1.000 n=12}
_Types	₃₄₀	₃₄₀	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{194,197k (± 0.04%)}	_{162,825k (± 0.04%)}	_{🟩-31,372k (-16.15%)}	_162,656k	_162,998k	_{p=0.000 n=12}
_{Memory Allocs}	_{822,157 (± 0.20%)}	_{822,085 (± 0.15%)}	_~	_819,108	_827,296	_{p=0.799 n=12}
_{Config Time}	_{0.008s (± 5.90%)}	_{0.009s (± 5.90%)}	_~	_0.008s	_0.010s	_{p=1.000 n=12}
_{Parse Time}	_{0.229s (± 2.05%)}	_{0.220s (± 2.61%)}	_{🟩-0.009s (- 4.11%)}	_0.197s	_0.231s	_{p=0.004 n=12}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.238s (± 1.99%)}	_{0.229s (± 2.52%)}	_{🟩-0.009s (- 3.92%)}	_0.206s	_0.240s	_{p=0.005 n=12}
_{xstate-main - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,020,005	_1,020,005	_~	_~	_~	_{p=1.000 n=12}
_Types	_376,891	_376,891	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{603,515k (± 0.01%)}	_{580,153k (± 0.02%)}	_{🟩-23,362k (- 3.87%)}	_579,856k	_580,413k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,752,201 (± 0.06%)}	_{4,750,219 (± 0.04%)}	_~	_4,747,240	_4,756,227	_{p=0.291 n=12}
_{Config Time}	_0.003s	_{0.003s (± 8.64%)}	_~	_0.002s	_0.003s	_{p=0.478 n=12}
_{Parse Time}	_{0.146s (± 3.44%)}	_{0.139s (± 2.97%)}	_{🟩-0.007s (- 4.96%)}	_0.130s	_0.149s	_{p=0.037 n=12}
_{Bind Time}	_{0.040s (±17.60%)}	_{0.047s (±17.71%)}	_{🔻+0.007s (+18.83%)}	_0.036s	_0.070s	_{p=0.049 n=12}
_{Check Time}	_{1.086s (± 0.92%)}	_{1.121s (± 0.89%)}	_{+0.036s (+ 3.29%)}	_1.090s	_1.147s	_{p=0.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{1.283s (± 0.82%)}	_{1.320s (± 0.79%)}	_{+0.037s (+ 2.89%)}	_1.276s	_1.336s	_{p=0.000 n=12}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
mui-docs - native
self-build-src - native
self-compiler - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₁₂
_Baseline	_baseline	₁₂

Developer Information:

Download Benchmarks

Jake Bailey (jakebailey) · 2026-08-14T07:28:14Z

TypeScript Bot (@typescript-bot) perf test this faster

typescript-automation · 2026-08-14T07:28:18Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`perf test this faster`	✅ Started	👀 Results

typescript-automation · 2026-08-14T07:58:26Z

Jake Bailey (@jakebailey)
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{Compiler-Unions - native}
_Errors	₄₁	₄₁	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_115,480	_115,480	_~	_~	_~	_{p=1.000 n=12}
_Types	_96,945	_96,945	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{149,379k (± 0.47%)}	_{141,073k (± 0.40%)}	_{🟩-8,306k (- 5.56%)}	_138,945k	_142,414k	_{p=0.000 n=12}
_{Memory Allocs}	_{2,247,406 (± 0.00%)}	_{2,247,451 (± 0.00%)}	_~	_2,247,188	_2,247,671	_{p=0.347 n=12}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.041s (± 5.08%)}	_{0.038s (± 5.20%)}	_~	_0.034s	_0.044s	_{p=0.065 n=12}
_{Bind Time}	_{0.013s (±15.87%)}	_{0.013s (±11.47%)}	_~	_0.010s	_0.018s	_{p=0.347 n=12}
_{Check Time}	_{0.509s (± 0.71%)}	_{0.510s (± 0.96%)}	_~	_0.499s	_0.523s	_{p=0.503 n=12}
_{Emit Time}	_{0.268s (± 2.10%)}	_{0.273s (± 1.81%)}	_~	_0.259s	_0.283s	_{p=0.086 n=12}
_{Total Time}	_{0.836s (± 0.66%)}	_{0.841s (± 0.95%)}	_~	_0.824s	_0.867s	_{p=0.560 n=12}
_{angular-1 - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_{846,471 (± 0.10%)}	_{847,433 (± 0.07%)}	_{+963 (+ 0.11%)}	_845,561	_848,540	_{p=0.046 n=12}
_Types	_{249,913 (± 0.00%)}	_{249,913 (± 0.00%)}	_~	_249,910	_249,915	_{p=0.527 n=12}
_{Memory Used}	_{793,042k (± 0.04%)}	_{735,526k (± 0.13%)}	_{🟩-57,515k (- 7.25%)}	_734,414k	_740,115k	_{p=0.000 n=12}
_{Memory Allocs}	_{13,040,136 (± 0.06%)}	_{13,048,408 (± 0.06%)}	_{+8,272 (+ 0.06%)}	_13,042,328	_13,088,786	_{p=0.012 n=12}
_{Config Time}	_0.016s	_{0.016s (± 1.13%)}	_~	_0.016s	_0.017s	_{p=1.000 n=12}
_{Parse Time}	_{0.281s (± 2.37%)}	_{0.267s (± 2.05%)}	_{🟩-0.013s (- 4.81%)}	_0.247s	_0.275s	_{p=0.002 n=12}
_{Bind Time}	_{0.061s (± 8.27%)}	_{0.063s (± 8.09%)}	_{+0.001s (+ 1.76%)}	_0.058s	_0.088s	_{p=0.029 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_{1.654s (± 0.84%)}	_{1.661s (± 1.38%)}	_~	_1.619s	_1.750s	_{p=0.921 n=12}
_{Total Time}	_{2.028s (± 0.82%)}	_{2.021s (± 1.36%)}	_~	_1.971s	_2.131s	_{p=0.401 n=12}
_{mui-docs - native}
_Errors	_{11,278 (± 0.02%)}	_{11,275 (± 0.03%)}	_~	_11,262	_11,281	_{p=0.071 n=12}
_Symbols	_4,313,827	_4,313,827	_~	_~	_~	_{p=1.000 n=12}
_Types	_1,641,392	_1,641,392	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{4,908,083k (± 0.03%)}	_{4,856,819k (± 0.03%)}	_{-51,263k (- 1.04%)}	_4,854,612k	_4,860,283k	_{p=0.000 n=12}
_{Memory Allocs}	_{50,079,407 (± 0.02%)}	_{50,081,096 (± 0.03%)}	_~	_50,030,474	_50,122,498	_{p=0.590 n=12}
_{Config Time}	_{0.016s (± 2.08%)}	_{0.016s (± 1.81%)}	_~	_0.015s	_0.016s	_{p=0.667 n=12}
_{Parse Time}	_{0.551s (± 2.52%)}	_{0.537s (± 2.19%)}	_~	_0.501s	_0.560s	_{p=0.117 n=12}
_{Bind Time}	_0.002s	_{0.003s (±31.51%)}	_{🔻+0.001s (+66.67%)}	_0.002s	_0.006s	_{p=0.037 n=12}
_{Check Time}	_{17.234s (± 0.27%)}	_{17.111s (± 0.29%)}	_{-0.122s (- 0.71%)}	_17.045s	_17.333s	_{p=0.000 n=12}
_{Emit Time}	_{0.444s (± 2.21%)}	_{0.460s (± 2.67%)}	_~	_0.437s	_0.478s	_{p=0.057 n=12}
_{Total Time}	_{18.992s (± 0.36%)}	_{18.874s (± 0.31%)}	_{-0.118s (- 0.62%)}	_18.734s	_19.070s	_{p=0.032 n=12}
_{self-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,394,411	_1,394,411	_~	_~	_~	_{p=1.000 n=12}
_Types	_443,627	_443,627	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{1,642,073k (± 0.30%)}	_{1,522,506k (± 0.30%)}	_{🟩-119,568k (- 7.28%)}	_1,509,291k	_1,533,722k	_{p=0.000 n=12}
_{Memory Allocs}	_{96,886,799 (± 0.04%)}	_{96,934,272 (± 0.04%)}	_~	_96,859,790	_97,049,921	_{p=0.101 n=12}
_{Config Time}	_{0.003s (±14.42%)}	_{0.003s (±12.29%)}	_~	_0.002s	_0.004s	_{p=0.196 n=12}
_{Parse Time}	_{0.196s (± 3.24%)}	_{0.190s (± 2.69%)}	_~	_0.175s	_0.203s	_{p=0.183 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.830s (± 0.38%)}	_{1.852s (± 0.60%)}	_{+0.022s (+ 1.19%)}	_1.829s	_1.876s	_{p=0.001 n=12}
_{Emit Time}	_{0.304s (± 4.57%)}	_{0.286s (± 6.22%)}	_~	_0.247s	_0.329s	_{p=0.104 n=12}
_{Total Time}	_{25.264s (± 0.64%)}	_{25.188s (± 0.71%)}	_~	_24.724s	_25.632s	_{p=0.378 n=12}
_{self-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_337,618	_337,618	_~	_~	_~	_{p=1.000 n=12}
_Types	_198,941	_198,941	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{319,704k (± 0.07%)}	_{300,389k (± 0.06%)}	_{🟩-19,315k (- 6.04%)}	_300,057k	_300,990k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,660,532 (± 0.01%)}	_{4,664,113 (± 0.01%)}	_{+3,580 (+ 0.08%)}	_4,662,879	_4,665,627	_{p=0.000 n=12}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.111s (± 4.98%)}	_{0.105s (± 4.45%)}	_~	_0.094s	_0.120s	_{p=0.182 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.066s (± 0.69%)}	_{1.075s (± 0.30%)}	_{+0.010s (+ 0.89%)}	_1.070s	_1.085s	_{p=0.037 n=12}
_{Emit Time}	_{0.142s (±11.28%)}	_{0.144s (±13.17%)}	_~	_0.100s	_0.182s	_{p=0.766 n=12}
_{Total Time}	_{1.373s (± 1.09%)}	_{1.379s (± 1.34%)}	_~	_1.339s	_1.434s	_{p=0.943 n=12}
_{ts-pre-modules - native}
_Errors	₈₇	₈₇	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_305,341	_305,341	_~	_~	_~	_{p=1.000 n=12}
_Types	_182,038	_182,038	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{277,343k (± 0.03%)}	_{261,048k (± 0.01%)}	_{🟩-16,295k (- 5.88%)}	_260,958k	_261,144k	_{p=0.000 n=12}
_{Memory Allocs}	_{1,627,993 (± 0.01%)}	_{1,628,028 (± 0.01%)}	_~	_1,627,691	_1,628,531	_{p=0.932 n=12}
_{Config Time}	_{0.000s (±217.90%)}	_{0.000s (±217.90%)}	_~	_0.000s	_0.001s	_{p=1.000 n=12}
_{Parse Time}	_{0.098s (± 3.95%)}	_{0.095s (± 3.21%)}	_~	_0.086s	_0.102s	_{p=0.234 n=12}
_{Bind Time}	_{0.042s (±11.32%)}	_{0.039s (± 9.22%)}	_~	_0.029s	_0.052s	_{p=0.369 n=12}
_{Check Time}	_{0.839s (± 0.68%)}	_{0.855s (± 0.64%)}	_{+0.016s (+ 1.85%)}	_0.845s	_0.871s	_{p=0.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.994s (± 0.89%)}	_{1.004s (± 0.76%)}	_~	_0.989s	_1.026s	_{p=0.075 n=12}
_{vscode - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_7,618,605	_7,618,605	_~	_~	_~	_{p=1.000 n=12}
_Types	_2,622,983	_2,622,983	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{5,163,801k (± 0.01%)}	_{4,883,724k (± 0.02%)}	_{🟩-280,077k (- 5.42%)}	_4,880,661k	_4,886,609k	_{p=0.000 n=12}
_{Memory Allocs}	_{40,111,827 (± 0.02%)}	_{40,115,105 (± 0.03%)}	_~	_40,102,974	_40,180,990	_{p=0.514 n=12}
_{Config Time}	_{0.061s (± 0.40%)}	_{0.061s (± 0.40%)}	_~	_0.061s	_0.062s	_{p=0.137 n=12}
_{Parse Time}	_{1.585s (± 1.50%)}	_{1.441s (± 1.92%)}	_{🟩-0.144s (- 9.10%)}	_1.387s	_1.523s	_{p=0.000 n=12}
_{Bind Time}	_{0.330s (± 0.24%)}	_{0.392s (±16.41%)}	_{🔻+0.061s (+18.63%)}	_0.332s	_0.669s	_{p=0.000 n=12}
_{Check Time}	_{9.707s (± 0.35%)}	_{9.651s (± 0.79%)}	_{-0.056s (- 0.58%)}	_9.392s	_9.822s	_{p=0.019 n=12}
_{Emit Time}	_{2.923s (± 0.67%)}	_{3.149s (± 9.96%)}	_{🔻+0.227s (+ 7.75%)}	_2.905s	_4.631s	_{p=0.014 n=12}
_{Total Time}	_{14.682s (± 0.30%)}	_{14.775s (± 1.97%)}	_~	_14.479s	_16.090s	_{p=0.247 n=12}
_{webpack - native}
_Errors	₂	₂	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,380	_1,380	_~	_~	_~	_{p=1.000 n=12}
_Types	₃₄₀	₃₄₀	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{194,016k (± 0.06%)}	_{162,742k (± 0.08%)}	_{🟩-31,274k (-16.12%)}	_162,437k	_163,213k	_{p=0.000 n=12}
_{Memory Allocs}	_{821,303 (± 0.10%)}	_{821,747 (± 0.19%)}	_~	_818,996	_827,442	_{p=0.932 n=12}
_{Config Time}	_0.008s	_0.008s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.202s (± 2.39%)}	_{0.198s (± 1.43%)}	_{-0.004s (- 2.11%)}	_0.188s	_0.205s	_{p=0.039 n=12}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.210s (± 2.29%)}	_{0.206s (± 1.37%)}	_{-0.004s (- 2.06%)}	_0.196s	_0.213s	_{p=0.034 n=12}
_{xstate-main - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,020,005	_1,020,005	_~	_~	_~	_{p=1.000 n=12}
_Types	_376,891	_376,891	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{603,410k (± 0.02%)}	_{580,091k (± 0.02%)}	_{🟩-23,319k (- 3.86%)}	_579,847k	_580,298k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,749,845 (± 0.03%)}	_{4,750,512 (± 0.05%)}	_~	_4,746,400	_4,757,830	_{p=0.932 n=12}
_{Config Time}	_{0.003s (± 8.64%)}	_{0.003s (± 8.64%)}	_~	_0.002s	_0.003s	_{p=1.000 n=12}
_{Parse Time}	_{0.145s (± 3.78%)}	_{0.142s (± 3.08%)}	_~	_0.133s	_0.153s	_{p=0.417 n=12}
_{Bind Time}	_{0.047s (±20.62%)}	_{0.040s (±13.69%)}	_~	_0.034s	_0.059s	_{p=0.853 n=12}
_{Check Time}	_{1.089s (± 0.77%)}	_{1.112s (± 0.69%)}	_{+0.024s (+ 2.17%)}	_1.091s	_1.125s	_{p=0.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{1.293s (± 1.12%)}	_{1.307s (± 0.40%)}	_~	_1.297s	_1.320s	_{p=0.097 n=12}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
mui-docs - native
self-build-src - native
self-compiler - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₁₂
_Baseline	_baseline	₁₂

Developer Information:

Download Benchmarks

Jake Bailey (jakebailey) · 2026-08-14T08:23:52Z

TypeScript Bot (@typescript-bot) perf test this faster

typescript-automation · 2026-08-14T08:23:57Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`perf test this faster`	✅ Started	👀 Results

typescript-automation · 2026-08-14T08:57:03Z

Jake Bailey (@jakebailey)
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{Compiler-Unions - native}
_Errors	₄₁	₄₁	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_115,480	_115,480	_~	_~	_~	_{p=1.000 n=12}
_Types	_96,945	_96,945	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{149,128k (± 0.35%)}	_{140,792k (± 0.42%)}	_{🟩-8,336k (- 5.59%)}	_139,264k	_142,583k	_{p=0.000 n=12}
_{Memory Allocs}	_{2,247,407 (± 0.00%)}	_{2,247,351 (± 0.00%)}	_~	_2,247,045	_2,247,646	_{p=0.478 n=12}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.041s (± 3.69%)}	_{0.038s (± 3.83%)}	_{🟩-0.003s (- 7.17%)}	_0.034s	_0.041s	_{p=0.007 n=12}
_{Bind Time}	_{0.013s (±10.75%)}	_{0.012s (±12.12%)}	_~	_0.010s	_0.017s	_{p=0.606 n=12}
_{Check Time}	_{0.513s (± 0.85%)}	_{0.511s (± 0.65%)}	_~	_0.501s	_0.521s	_{p=0.831 n=12}
_{Emit Time}	_{0.273s (± 1.91%)}	_{0.271s (± 3.32%)}	_~	_0.252s	_0.307s	_{p=0.522 n=12}
_{Total Time}	_{0.846s (± 0.79%)}	_{0.839s (± 0.91%)}	_~	_0.823s	_0.869s	_{p=0.091 n=12}
_{angular-1 - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_{847,022 (± 0.08%)}	_{846,793 (± 0.08%)}	_~	_844,545	_848,350	_{p=0.630 n=12}
_Types	_{249,915 (± 0.00%)}	_{249,912 (± 0.00%)}	_~	_249,910	_249,915	_{p=0.329 n=12}
_{Memory Used}	_{792,948k (± 0.04%)}	_{735,306k (± 0.06%)}	_{🟩-57,641k (- 7.27%)}	_734,505k	_737,036k	_{p=0.000 n=12}
_{Memory Allocs}	_{13,036,504 (± 0.04%)}	_{13,051,968 (± 0.11%)}	_{+15,463 (+ 0.12%)}	_13,041,414	_13,125,309	_{p=0.000 n=12}
_{Config Time}	_0.016s	_0.016s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.280s (± 1.83%)}	_{0.269s (± 2.57%)}	_{🟩-0.011s (- 3.99%)}	_0.245s	_0.282s	_{p=0.010 n=12}
_{Bind Time}	_{0.061s (± 8.34%)}	_{0.064s (±16.47%)}	_~	_0.052s	_0.115s	_{p=0.775 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_{1.644s (± 0.85%)}	_{1.654s (± 1.71%)}	_~	_1.625s	_1.766s	_{p=0.943 n=12}
_{Total Time}	_{2.016s (± 0.95%)}	_{2.018s (± 1.82%)}	_~	_1.980s	_2.146s	_{p=0.104 n=12}
_{mui-docs - native}
_Errors	_{11,276 (± 0.03%)}	_{11,277 (± 0.03%)}	_~	_11,265	_11,282	_{p=0.559 n=12}
_Symbols	_4,313,827	_4,313,827	_~	_~	_~	_{p=1.000 n=12}
_Types	_1,641,392	_1,641,392	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{4,907,353k (± 0.04%)}	_{4,856,761k (± 0.04%)}	_{-50,593k (- 1.03%)}	_4,852,054k	_4,862,000k	_{p=0.000 n=12}
_{Memory Allocs}	_{50,065,370 (± 0.04%)}	_{50,067,181 (± 0.04%)}	_~	_50,019,316	_50,129,005	_{p=0.843 n=12}
_{Config Time}	_{0.016s (± 2.12%)}	_{0.015s (± 2.10%)}	_~	_0.015s	_0.016s	_{p=1.000 n=12}
_{Parse Time}	_{0.555s (± 2.25%)}	_{0.536s (± 2.46%)}	_{🟩-0.020s (- 3.56%)}	_0.494s	_0.559s	_{p=0.027 n=12}
_{Bind Time}	_0.002s	_{0.002s (±24.21%)}	_~	_0.002s	_0.005s	_{p=1.000 n=12}
_{Check Time}	_{17.257s (± 0.27%)}	_{17.283s (± 0.31%)}	_~	_17.204s	_17.513s	_{p=0.702 n=12}
_{Emit Time}	_{0.446s (± 2.24%)}	_{0.454s (± 2.74%)}	_~	_0.436s	_0.479s	_{p=0.558 n=12}
_{Total Time}	_{19.010s (± 0.39%)}	_{19.023s (± 0.34%)}	_~	_18.884s	_19.248s	_{p=0.932 n=12}
_{self-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,394,411	_1,394,411	_~	_~	_~	_{p=1.000 n=12}
_Types	_443,627	_443,627	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{1,642,547k (± 0.28%)}	_{1,526,438k (± 0.30%)}	_{🟩-116,109k (- 7.07%)}	_1,512,617k	_1,540,569k	_{p=0.000 n=12}
_{Memory Allocs}	_{96,907,789 (± 0.04%)}	_{96,958,905 (± 0.05%)}	_{+51,116 (+ 0.05%)}	_96,870,771	_97,076,016	_{p=0.028 n=12}
_{Config Time}	_{0.003s (±12.31%)}	_{0.003s (±15.93%)}	_~	_0.002s	_0.004s	_{p=0.081 n=12}
_{Parse Time}	_{0.199s (± 2.15%)}	_{0.189s (± 3.60%)}	_{🟩-0.010s (- 4.90%)}	_0.171s	_0.210s	_{p=0.018 n=12}
_{Bind Time}	_{0.000s (±217.90%)}	_{0.000s (±217.90%)}	_~	_0.000s	_0.004s	_{p=1.000 n=12}
_{Check Time}	_{1.830s (± 0.55%)}	_{1.841s (± 0.40%)}	_~	_1.823s	_1.863s	_{p=0.091 n=12}
_{Emit Time}	_{0.302s (± 2.52%)}	_{0.290s (± 5.59%)}	_~	_0.251s	_0.319s	_{p=0.451 n=12}
_{Total Time}	_{25.270s (± 0.53%)}	_{25.067s (± 0.70%)}	_~	_24.616s	_25.439s	_{p=0.060 n=12}
_{self-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_337,618	_337,618	_~	_~	_~	_{p=1.000 n=12}
_Types	_198,941	_198,941	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{319,753k (± 0.07%)}	_{300,329k (± 0.03%)}	_{🟩-19,425k (- 6.07%)}	_300,096k	_300,666k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,660,786 (± 0.01%)}	_{4,663,857 (± 0.01%)}	_{+3,071 (+ 0.07%)}	_4,662,450	_4,665,659	_{p=0.000 n=12}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.112s (± 3.12%)}	_{0.109s (± 5.19%)}	_~	_0.097s	_0.123s	_{p=0.384 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.065s (± 0.67%)}	_{1.070s (± 0.47%)}	_~	_1.059s	_1.087s	_{p=0.560 n=12}
_{Emit Time}	_{0.158s (± 5.56%)}	_{0.131s (±15.96%)}	_~	_0.101s	_0.181s	_{p=0.098 n=12}
_{Total Time}	_{1.387s (± 0.67%)}	_{1.365s (± 1.18%)}	_{-0.022s (- 1.56%)}	_1.334s	_1.411s	_{p=0.034 n=12}
_{ts-pre-modules - native}
_Errors	₈₇	₈₇	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_305,341	_305,341	_~	_~	_~	_{p=1.000 n=12}
_Types	_182,038	_182,038	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{277,349k (± 0.01%)}	_{261,048k (± 0.03%)}	_{🟩-16,301k (- 5.88%)}	_260,797k	_261,213k	_{p=0.000 n=12}
_{Memory Allocs}	_{1,627,965 (± 0.01%)}	_{1,628,194 (± 0.01%)}	_~	_1,627,643	_1,628,788	_{p=0.089 n=12}
_{Config Time}	_{0.000s (±217.90%)}	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.099s (± 4.75%)}	_{0.091s (± 3.98%)}	_{🟩-0.007s (- 7.42%)}	_0.082s	_0.101s	_{p=0.021 n=12}
_{Bind Time}	_{0.040s (± 8.82%)}	_{0.042s (± 9.12%)}	_~	_0.033s	_0.053s	_{p=0.467 n=12}
_{Check Time}	_{0.843s (± 0.92%)}	_{0.856s (± 0.90%)}	_~	_0.846s	_0.881s	_{p=0.061 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.997s (± 1.11%)}	_{1.005s (± 1.02%)}	_~	_0.993s	_1.041s	_{p=0.399 n=12}
_{vscode - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_7,634,846	_7,634,846	_~	_~	_~	_{p=1.000 n=12}
_Types	_2,629,323	_2,629,323	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{5,168,851k (± 0.01%)}	_{4,890,343k (± 0.02%)}	_{🟩-278,507k (- 5.39%)}	_4,887,499k	_4,892,185k	_{p=0.000 n=12}
_{Memory Allocs}	_{40,138,107 (± 0.01%)}	_{40,141,796 (± 0.01%)}	_{+3,689 (+ 0.01%)}	_40,134,627	_40,157,363	_{p=0.033 n=12}
_{Config Time}	_{0.060s (± 0.83%)}	_{0.060s (± 0.60%)}	_~	_0.059s	_0.061s	_{p=0.301 n=12}
_{Parse Time}	_{1.588s (± 1.61%)}	_{1.446s (± 1.69%)}	_{🟩-0.141s (- 8.90%)}	_1.369s	_1.500s	_{p=0.000 n=12}
_{Bind Time}	_{0.330s (± 0.62%)}	_{0.359s (±18.37%)}	_~	_0.328s	_0.692s	_{p=0.421 n=12}
_{Check Time}	_{9.732s (± 0.38%)}	_{9.573s (± 0.86%)}	_{-0.159s (- 1.63%)}	_9.160s	_9.622s	_{p=0.000 n=12}
_{Emit Time}	_{2.916s (± 0.89%)}	_{3.058s (± 7.05%)}	_{🔻+0.142s (+ 4.87%)}	_2.921s	_4.141s	_{p=0.005 n=12}
_{Total Time}	_{14.703s (± 0.36%)}	_{14.576s (± 1.29%)}	_{-0.127s (- 0.86%)}	_14.426s	_15.515s	_{p=0.001 n=12}
_{webpack - native}
_Errors	₂	₂	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,380	_1,380	_~	_~	_~	_{p=1.000 n=12}
_Types	₃₄₀	₃₄₀	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{194,106k (± 0.07%)}	_{162,786k (± 0.07%)}	_{🟩-31,320k (-16.14%)}	_162,475k	_163,062k	_{p=0.000 n=12}
_{Memory Allocs}	_{821,766 (± 0.15%)}	_{821,757 (± 0.17%)}	_~	_818,636	_825,823	_{p=0.799 n=12}
_{Config Time}	_0.008s	_0.008s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.200s (± 2.90%)}	_{0.194s (± 3.16%)}	_~	_0.179s	_0.205s	_{p=0.257 n=12}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.208s (± 2.78%)}	_{0.202s (± 2.96%)}	_~	_0.188s	_0.213s	_{p=0.270 n=12}
_{xstate-main - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,020,005	_1,020,005	_~	_~	_~	_{p=1.000 n=12}
_Types	_376,891	_376,891	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{603,368k (± 0.02%)}	_{580,155k (± 0.01%)}	_{🟩-23,213k (- 3.85%)}	_579,995k	_580,370k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,749,184 (± 0.04%)}	_{4,749,467 (± 0.03%)}	_~	_4,745,184	_4,755,191	_{p=0.551 n=12}
_{Config Time}	_0.003s	_{0.003s (±10.34%)}	_~	_0.002s	_0.003s	_{p=0.217 n=12}
_{Parse Time}	_{0.145s (± 4.24%)}	_{0.143s (± 2.57%)}	_~	_0.130s	_0.154s	_{p=0.540 n=12}
_{Bind Time}	_{0.046s (±17.92%)}	_{0.040s (±17.57%)}	_~	_0.033s	_0.068s	_{p=0.105 n=12}
_{Check Time}	_{1.091s (± 0.82%)}	_{1.111s (± 0.92%)}	_{+0.020s (+ 1.79%)}	_1.082s	_1.131s	_{p=0.004 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{1.297s (± 1.01%)}	_{1.306s (± 0.40%)}	_~	_1.296s	_1.317s	_{p=0.560 n=12}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
mui-docs - native
self-build-src - native
self-compiler - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₁₂
_Baseline	_baseline	₁₂

Developer Information:

Download Benchmarks

Jake Bailey (jakebailey) · 2026-08-14T12:37:09Z

TypeScript Bot (@typescript-bot) perf test this faster

typescript-automation · 2026-08-14T12:37:14Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`perf test this faster`	✅ Started	👀 Results

typescript-automation · 2026-08-14T13:07:58Z

Jake Bailey (@jakebailey)
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{Compiler-Unions - native}
_Errors	₄₁	₄₁	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_115,480	_115,480	_~	_~	_~	_{p=1.000 n=12}
_Types	_96,945	_96,945	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{149,576k (± 0.40%)}	_{140,837k (± 0.52%)}	_{🟩-8,739k (- 5.84%)}	_139,573k	_142,997k	_{p=0.000 n=12}
_{Memory Allocs}	_{2,247,394 (± 0.00%)}	_{2,247,500 (± 0.00%)}	_~	_2,247,193	_2,247,741	_{p=0.060 n=12}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.041s (± 4.36%)}	_{0.039s (± 3.76%)}	_~	_0.036s	_0.045s	_{p=0.293 n=12}
_{Bind Time}	_{0.012s (± 9.04%)}	_{0.014s (±11.59%)}	_~	_0.010s	_0.018s	_{p=0.176 n=12}
_{Check Time}	_{0.513s (± 0.84%)}	_{0.496s (± 0.62%)}	_{🟩-0.017s (- 3.30%)}	_0.489s	_0.503s	_{p=0.000 n=12}
_{Emit Time}	_{0.269s (± 1.92%)}	_{0.271s (± 1.62%)}	_~	_0.263s	_0.284s	_{p=0.787 n=12}
_{Total Time}	_{0.841s (± 0.87%)}	_{0.827s (± 0.77%)}	_{-0.014s (- 1.66%)}	_0.816s	_0.844s	_{p=0.014 n=12}
_{angular-1 - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_{847,076 (± 0.08%)}	_{846,593 (± 0.09%)}	_~	_844,527	_848,292	_{p=0.347 n=12}
_Types	_{249,914 (± 0.00%)}	_{249,911 (± 0.00%)}	_~	_249,910	_249,913	_{p=0.128 n=12}
_{Memory Used}	_{792,983k (± 0.05%)}	_{735,832k (± 0.04%)}	_{🟩-57,151k (- 7.21%)}	_735,307k	_736,764k	_{p=0.000 n=12}
_{Memory Allocs}	_{13,045,751 (± 0.12%)}	_{13,044,987 (± 0.02%)}	_{-764 (- 0.01%)}	_13,041,277	_13,050,502	_{p=0.006 n=12}
_{Config Time}	_0.016s	_0.016s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.282s (± 2.09%)}	_{0.265s (± 2.73%)}	_{🟩-0.017s (- 5.98%)}	_0.251s	_0.287s	_{p=0.001 n=12}
_{Bind Time}	_{0.059s (± 1.46%)}	_{0.056s (± 0.48%)}	_{🟩-0.003s (- 5.75%)}	_0.055s	_0.057s	_{p=0.000 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_{1.649s (± 0.85%)}	_{1.626s (± 1.03%)}	_{-0.023s (- 1.41%)}	_1.603s	_1.706s	_{p=0.003 n=12}
_{Total Time}	_{2.023s (± 0.76%)}	_{1.976s (± 0.84%)}	_{-0.047s (- 2.32%)}	_1.954s	_2.052s	_{p=0.000 n=12}
_{mui-docs - native}
_Errors	_{11,278 (± 0.03%)}	_{11,276 (± 0.04%)}	_~	_11,262	_11,282	_{p=0.463 n=12}
_Symbols	_4,313,827	_4,313,827	_~	_~	_~	_{p=1.000 n=12}
_Types	_1,641,392	_1,641,392	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{4,906,731k (± 0.03%)}	_{4,857,113k (± 0.03%)}	_{-49,619k (- 1.01%)}	_4,853,628k	_4,860,399k	_{p=0.000 n=12}
_{Memory Allocs}	_{50,062,541 (± 0.04%)}	_{50,073,318 (± 0.02%)}	_~	_50,052,016	_50,103,141	_{p=0.114 n=12}
_{Config Time}	_{0.016s (± 2.12%)}	_{0.016s (± 2.12%)}	_~	_0.015s	_0.016s	_{p=1.000 n=12}
_{Parse Time}	_{0.558s (± 2.39%)}	_{0.538s (± 2.08%)}	_{🟩-0.020s (- 3.56%)}	_0.502s	_0.558s	_{p=0.006 n=12}
_{Bind Time}	_0.002s	_0.002s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{17.222s (± 0.25%)}	_{17.103s (± 0.16%)}	_{-0.119s (- 0.69%)}	_17.051s	_17.158s	_{p=0.000 n=12}
_{Emit Time}	_{0.452s (± 2.42%)}	_{0.462s (± 3.60%)}	_~	_0.435s	_0.520s	_{p=0.876 n=12}
_{Total Time}	_{18.976s (± 0.28%)}	_{18.800s (± 0.26%)}	_{-0.176s (- 0.92%)}	_18.703s	_18.898s	_{p=0.000 n=12}
_{self-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,394,411	_1,394,411	_~	_~	_~	_{p=1.000 n=12}
_Types	_443,627	_443,627	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{1,642,853k (± 0.30%)}	_{1,525,089k (± 0.27%)}	_{🟩-117,763k (- 7.17%)}	_1,514,238k	_1,536,677k	_{p=0.000 n=12}
_{Memory Allocs}	_{96,911,796 (± 0.05%)}	_{96,942,094 (± 0.03%)}	_~	_96,866,444	_97,014,400	_{p=0.319 n=12}
_{Config Time}	_{0.003s (±18.34%)}	_{0.003s (±16.58%)}	_~	_0.002s	_0.005s	_{p=0.406 n=12}
_{Parse Time}	_{0.200s (± 1.93%)}	_{0.187s (± 2.14%)}	_{🟩-0.013s (- 6.30%)}	_0.176s	_0.196s	_{p=0.000 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.831s (± 0.56%)}	_{1.821s (± 0.38%)}	_~	_1.803s	_1.840s	_{p=0.213 n=12}
_{Emit Time}	_{0.298s (± 3.88%)}	_{0.292s (± 6.54%)}	_~	_0.250s	_0.333s	_{p=0.877 n=12}
_{Total Time}	_{25.275s (± 0.64%)}	_{24.890s (± 0.89%)}	_{-0.385s (- 1.52%)}	_24.409s	_25.704s	_{p=0.005 n=12}
_{self-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_337,618	_337,618	_~	_~	_~	_{p=1.000 n=12}
_Types	_198,941	_198,941	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{319,677k (± 0.03%)}	_{300,323k (± 0.03%)}	_{🟩-19,354k (- 6.05%)}	_300,081k	_300,599k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,660,936 (± 0.01%)}	_{4,664,169 (± 0.01%)}	_{+3,233 (+ 0.07%)}	_4,662,771	_4,665,304	_{p=0.000 n=12}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.110s (± 3.88%)}	_{0.110s (± 4.68%)}	_~	_0.101s	_0.123s	_{p=1.000 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.058s (± 0.51%)}	_{1.057s (± 0.41%)}	_~	_1.048s	_1.071s	_{p=0.766 n=12}
_{Emit Time}	_{0.155s (± 7.40%)}	_{0.137s (±13.63%)}	_~	_0.099s	_0.172s	_{p=0.131 n=12}
_{Total Time}	_{1.379s (± 0.76%)}	_{1.359s (± 1.20%)}	_{-0.020s (- 1.43%)}	_1.323s	_1.408s	_{p=0.043 n=12}
_{ts-pre-modules - native}
_Errors	₈₇	₈₇	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_305,341	_305,341	_~	_~	_~	_{p=1.000 n=12}
_Types	_182,038	_182,038	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{277,252k (± 0.02%)}	_{261,032k (± 0.03%)}	_{🟩-16,220k (- 5.85%)}	_260,861k	_261,223k	_{p=0.000 n=12}
_{Memory Allocs}	_{1,628,002 (± 0.01%)}	_{1,628,085 (± 0.01%)}	_~	_1,627,843	_1,628,532	_{p=0.619 n=12}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.098s (± 4.36%)}	_{0.096s (± 4.70%)}	_~	_0.085s	_0.106s	_{p=0.521 n=12}
_{Bind Time}	_{0.037s (±13.21%)}	_{0.032s (± 8.29%)}	_~	_0.028s	_0.041s	_{p=0.181 n=12}
_{Check Time}	_{0.845s (± 0.48%)}	_{0.844s (± 0.63%)}	_~	_0.831s	_0.856s	_{p=0.853 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.995s (± 0.90%)}	_{0.988s (± 0.55%)}	_~	_0.970s	_1.000s	_{p=0.355 n=12}
_{vscode - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_7,666,058	_7,666,058	_~	_~	_~	_{p=1.000 n=12}
_Types	_2,631,981	_2,631,981	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{5,180,123k (± 0.01%)}	_{4,897,590k (± 0.01%)}	_{🟩-282,533k (- 5.45%)}	_4,896,647k	_4,899,149k	_{p=0.000 n=12}
_{Memory Allocs}	_{40,251,673 (± 0.02%)}	_{40,248,668 (± 0.01%)}	_~	_40,243,296	_40,257,764	_{p=0.977 n=12}
_{Config Time}	_{0.061s (± 0.30%)}	_{0.061s (± 0.60%)}	_~	_0.060s	_0.062s	_{p=0.590 n=12}
_{Parse Time}	_{1.577s (± 1.96%)}	_{1.447s (± 1.39%)}	_{🟩-0.130s (- 8.23%)}	_1.366s	_1.485s	_{p=0.000 n=12}
_{Bind Time}	_{0.350s (±11.40%)}	_{0.343s (±16.99%)}	_{-0.006s (- 1.81%)}	_0.314s	_0.638s	_{p=0.000 n=12}
_{Check Time}	_{9.616s (± 0.97%)}	_{9.367s (± 0.77%)}	_{-0.249s (- 2.59%)}	_9.005s	_9.427s	_{p=0.000 n=12}
_{Emit Time}	_{3.037s (± 7.42%)}	_{3.116s (± 6.62%)}	_{+0.079s (+ 2.60%)}	_2.955s	_4.149s	_{p=0.001 n=12}
_{Total Time}	_{14.721s (± 1.10%)}	_{14.414s (± 1.26%)}	_{-0.308s (- 2.09%)}	_14.251s	_15.314s	_{p=0.000 n=12}
_{webpack - native}
_Errors	₂	₂	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,380	_1,380	_~	_~	_~	_{p=1.000 n=12}
_Types	₃₄₀	₃₄₀	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{194,518k (± 0.05%)}	_{162,994k (± 0.09%)}	_{🟩-31,524k (-16.21%)}	_162,438k	_163,263k	_{p=0.000 n=12}
_{Memory Allocs}	_{821,649 (± 0.07%)}	_{822,165 (± 0.14%)}	_~	_819,964	_825,374	_{p=0.932 n=12}
_{Config Time}	_0.008s	_{0.008s (± 3.00%)}	_~	_0.008s	_0.009s	_{p=0.478 n=12}
_{Parse Time}	_{0.215s (± 2.63%)}	_{0.206s (± 1.65%)}	_{🟩-0.009s (- 4.03%)}	_0.199s	_0.218s	_{p=0.023 n=12}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.223s (± 2.50%)}	_{0.215s (± 1.59%)}	_{🟩-0.008s (- 3.77%)}	_0.207s	_0.227s	_{p=0.025 n=12}
_{xstate-main - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,020,005	_1,020,005	_~	_~	_~	_{p=1.000 n=12}
_Types	_376,891	_376,891	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{603,490k (± 0.02%)}	_{580,076k (± 0.01%)}	_{🟩-23,414k (- 3.88%)}	_579,856k	_580,300k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,750,853 (± 0.04%)}	_{4,751,618 (± 0.04%)}	_~	_4,747,051	_4,757,785	_{p=0.713 n=12}
_{Config Time}	_{0.003s (± 6.23%)}	_{0.003s (±10.34%)}	_~	_0.002s	_0.003s	_{p=0.590 n=12}
_{Parse Time}	_{0.147s (± 3.17%)}	_{0.138s (± 2.58%)}	_{🟩-0.009s (- 6.11%)}	_0.129s	_0.147s	_{p=0.006 n=12}
_{Bind Time}	_{0.041s (±13.55%)}	_{0.040s (±18.25%)}	_~	_0.032s	_0.066s	_{p=0.381 n=12}
_{Check Time}	_{1.083s (± 1.31%)}	_{1.095s (± 1.43%)}	_~	_1.054s	_1.132s	_{p=0.202 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{1.283s (± 1.22%)}	_{1.286s (± 1.38%)}	_~	_1.234s	_1.320s	_{p=0.831 n=12}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
mui-docs - native
self-build-src - native
self-compiler - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₁₂
_Baseline	_baseline	₁₂

Developer Information:

Download Benchmarks

Jake Bailey (jakebailey) · 2026-08-14T17:10:32Z

TypeScript Bot (@typescript-bot) perf test this faster

typescript-automation · 2026-08-14T17:10:36Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`perf test this faster`	✅ Started	👀 Results

typescript-automation · 2026-08-14T17:40:26Z

Jake Bailey (@jakebailey)
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{Compiler-Unions - native}
_Errors	₄₁	₄₁	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_115,480	_115,480	_~	_~	_~	_{p=1.000 n=12}
_Types	_96,945	_96,945	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{148,854k (± 0.42%)}	_{141,434k (± 0.44%)}	_{🟩-7,420k (- 4.98%)}	_140,021k	_142,790k	_{p=0.000 n=12}
_{Memory Allocs}	_{2,247,431 (± 0.00%)}	_{2,247,397 (± 0.00%)}	_~	_2,247,171	_2,247,604	_{p=0.590 n=12}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.041s (± 3.46%)}	_{0.037s (± 3.62%)}	_{🟩-0.004s (- 8.74%)}	_0.035s	_0.041s	_{p=0.002 n=12}
_{Bind Time}	_{0.012s (±10.30%)}	_{0.012s (± 9.81%)}	_~	_0.010s	_0.016s	_{p=0.959 n=12}
_{Check Time}	_{0.515s (± 0.94%)}	_{0.507s (± 0.83%)}	_{-0.009s (- 1.68%)}	_0.498s	_0.521s	_{p=0.004 n=12}
_{Emit Time}	_{0.272s (± 3.14%)}	_{0.275s (± 1.72%)}	_~	_0.258s	_0.284s	_{p=0.311 n=12}
_{Total Time}	_{0.847s (± 1.33%)}	_{0.839s (± 0.72%)}	_~	_0.827s	_0.856s	_{p=0.369 n=12}
_{angular-1 - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_{847,457 (± 0.08%)}	_{846,819 (± 0.09%)}	_~	_845,048	_848,645	_{p=0.128 n=12}
_Types	_{249,912 (± 0.00%)}	_{249,912 (± 0.00%)}	_~	_249,910	_249,914	_{p=0.943 n=12}
_{Memory Used}	_{793,422k (± 0.07%)}	_{735,512k (± 0.06%)}	_{🟩-57,910k (- 7.30%)}	_734,427k	_736,939k	_{p=0.000 n=12}
_{Memory Allocs}	_{13,046,171 (± 0.09%)}	_{13,049,268 (± 0.07%)}	_~	_13,041,627	_13,094,159	_{p=0.114 n=12}
_{Config Time}	_0.016s	_{0.016s (± 1.90%)}	_~	_0.016s	_0.017s	_{p=0.093 n=12}
_{Parse Time}	_{0.277s (± 2.55%)}	_{0.262s (± 2.17%)}	_{🟩-0.014s (- 5.21%)}	_0.247s	_0.272s	_{p=0.004 n=12}
_{Bind Time}	_{0.066s (±12.48%)}	_{0.056s (± 0.85%)}	_{🟩-0.010s (-15.64%)}	_0.054s	_0.057s	_{p=0.000 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_{1.663s (± 1.21%)}	_{1.628s (± 0.92%)}	_{-0.035s (- 2.12%)}	_1.604s	_1.687s	_{p=0.002 n=12}
_{Total Time}	_{2.042s (± 1.42%)}	_{1.975s (± 0.85%)}	_{🟩-0.067s (- 3.28%)}	_1.938s	_2.038s	_{p=0.000 n=12}
_{mui-docs - native}
_Errors	_{11,278 (± 0.03%)}	_{11,275 (± 0.06%)}	_~	_11,251	_11,282	_{p=0.783 n=12}
_Symbols	_4,230,792	_4,230,792	_~	_~	_~	_{p=1.000 n=12}
_Types	_1,591,020	_1,591,020	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{4,853,466k (± 0.03%)}	_{4,803,751k (± 0.04%)}	_{-49,716k (- 1.02%)}	_4,799,421k	_4,808,791k	_{p=0.000 n=12}
_{Memory Allocs}	_{48,401,868 (± 0.03%)}	_{48,408,832 (± 0.04%)}	_~	_48,367,855	_48,476,236	_{p=0.671 n=12}
_{Config Time}	_{0.015s (± 2.02%)}	_{0.015s (± 2.10%)}	_~	_0.015s	_0.016s	_{p=1.000 n=12}
_{Parse Time}	_{0.546s (± 3.39%)}	_{0.533s (± 2.86%)}	_~	_0.481s	_0.569s	_{p=0.386 n=12}
_{Bind Time}	_{0.002s (±24.21%)}	_{0.003s (±30.97%)}	_~	_0.002s	_0.005s	_{p=0.317 n=12}
_{Check Time}	_{15.626s (± 0.68%)}	_{15.396s (± 0.72%)}	_{-0.230s (- 1.47%)}	_15.161s	_15.606s	_{p=0.005 n=12}
_{Emit Time}	_{0.442s (± 1.61%)}	_{0.447s (± 2.71%)}	_~	_0.433s	_0.480s	_{p=0.639 n=12}
_{Total Time}	_{17.370s (± 0.68%)}	_{17.140s (± 0.64%)}	_{-0.230s (- 1.32%)}	_16.878s	_17.350s	_{p=0.005 n=12}
_{self-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,394,411	_1,394,411	_~	_~	_~	_{p=1.000 n=12}
_Types	_443,627	_443,627	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{1,639,915k (± 0.34%)}	_{1,527,625k (± 0.29%)}	_{🟩-112,290k (- 6.85%)}	_1,516,651k	_1,537,997k	_{p=0.000 n=12}
_{Memory Allocs}	_{96,886,284 (± 0.03%)}	_{96,982,496 (± 0.04%)}	_{+96,212 (+ 0.10%)}	_96,901,980	_97,056,273	_{p=0.000 n=12}
_{Config Time}	_{0.003s (±16.58%)}	_{0.003s (±14.42%)}	_~	_0.002s	_0.004s	_{p=0.384 n=12}
_{Parse Time}	_{0.195s (± 2.40%)}	_{0.190s (± 1.57%)}	_~	_0.182s	_0.198s	_{p=0.075 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.828s (± 0.44%)}	_{1.819s (± 0.43%)}	_~	_1.798s	_1.835s	_{p=0.091 n=12}
_{Emit Time}	_{0.306s (± 3.70%)}	_{0.286s (± 6.81%)}	_~	_0.248s	_0.341s	_{p=0.068 n=12}
_{Total Time}	_{25.214s (± 0.69%)}	_{24.835s (± 0.78%)}	_{-0.379s (- 1.50%)}	_24.239s	_25.321s	_{p=0.007 n=12}
_{self-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_337,618	_337,618	_~	_~	_~	_{p=1.000 n=12}
_Types	_198,941	_198,941	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{319,704k (± 0.05%)}	_{300,284k (± 0.07%)}	_{🟩-19,420k (- 6.07%)}	_299,807k	_301,120k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,660,793 (± 0.01%)}	_{4,663,816 (± 0.01%)}	_{+3,023 (+ 0.06%)}	_4,662,070	_4,665,479	_{p=0.000 n=12}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.115s (± 4.88%)}	_{0.108s (± 4.90%)}	_~	_0.095s	_0.119s	_{p=0.053 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.065s (± 0.71%)}	_{1.063s (± 0.88%)}	_~	_1.050s	_1.103s	_{p=0.561 n=12}
_{Emit Time}	_{0.149s (±10.07%)}	_{0.141s (±13.45%)}	_~	_0.103s	_0.170s	_{p=0.744 n=12}
_{Total Time}	_{1.383s (± 0.89%)}	_{1.365s (± 1.34%)}	_~	_1.320s	_1.395s	_{p=0.155 n=12}
_{ts-pre-modules - native}
_Errors	₈₇	₈₇	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_305,341	_305,341	_~	_~	_~	_{p=1.000 n=12}
_Types	_182,038	_182,038	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{277,310k (± 0.02%)}	_{260,967k (± 0.02%)}	_{🟩-16,344k (- 5.89%)}	_260,876k	_261,081k	_{p=0.000 n=12}
_{Memory Allocs}	_{1,628,019 (± 0.01%)}	_{1,628,139 (± 0.01%)}	_~	_1,627,711	_1,628,532	_{p=0.319 n=12}
_{Config Time}	_{0.000s (±113.79%)}	_0.000s	_~	_~	_~	_{p=0.217 n=12}
_{Parse Time}	_{0.101s (± 4.06%)}	_{0.093s (± 4.13%)}	_{🟩-0.008s (- 7.61%)}	_0.083s	_0.102s	_{p=0.012 n=12}
_{Bind Time}	_{0.040s (±11.48%)}	_{0.039s (±10.75%)}	_~	_0.032s	_0.051s	_{p=0.722 n=12}
_{Check Time}	_{0.841s (± 0.66%)}	_{0.842s (± 0.84%)}	_~	_0.825s	_0.860s	_{p=0.943 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.996s (± 0.85%)}	_{0.989s (± 0.70%)}	_~	_0.973s	_1.005s	_{p=0.259 n=12}
_{vscode - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_7,787,347	_7,787,347	_~	_~	_~	_{p=1.000 n=12}
_Types	_2,679,539	_2,679,539	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{5,237,089k (± 0.01%)}	_{4,954,243k (± 0.02%)}	_{🟩-282,846k (- 5.40%)}	_4,952,752k	_4,957,383k	_{p=0.000 n=12}
_{Memory Allocs}	_{40,640,909 (± 0.04%)}	_{40,632,306 (± 0.01%)}	_~	_40,624,769	_40,648,924	_{p=0.977 n=12}
_{Config Time}	_{0.061s (± 0.30%)}	_{0.061s (± 0.47%)}	_~	_0.060s	_0.061s	_{p=0.590 n=12}
_{Parse Time}	_{1.568s (± 2.13%)}	_{1.469s (± 2.09%)}	_{🟩-0.099s (- 6.31%)}	_1.414s	_1.546s	_{p=0.000 n=12}
_{Bind Time}	_{0.356s (±17.40%)}	_{0.313s (± 0.37%)}	_{🟩-0.042s (-11.95%)}	_0.309s	_0.315s	_{p=0.000 n=12}
_{Check Time}	_{10.080s (± 1.06%)}	_{9.827s (± 0.06%)}	_{-0.253s (- 2.51%)}	_9.813s	_9.840s	_{p=0.000 n=12}
_{Emit Time}	_{3.085s (± 9.70%)}	_{2.948s (± 1.10%)}	_~	_2.848s	_3.038s	_{p=0.767 n=12}
_{Total Time}	_{15.228s (± 1.57%)}	_{14.693s (± 0.31%)}	_{🟩-0.534s (- 3.51%)}	_14.594s	_14.851s	_{p=0.000 n=12}
_{webpack - native}
_Errors	₂	₂	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,380	_1,380	_~	_~	_~	_{p=1.000 n=12}
_Types	₃₄₀	₃₄₀	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{194,443k (± 0.07%)}	_{163,004k (± 0.08%)}	_{🟩-31,439k (-16.17%)}	_162,639k	_163,284k	_{p=0.000 n=12}
_{Memory Allocs}	_{823,574 (± 0.34%)}	_{824,376 (± 0.28%)}	_~	_821,114	_834,963	_{p=0.319 n=12}
_{Config Time}	_{0.008s (± 4.45%)}	_{0.008s (± 3.85%)}	_~	_0.008s	_0.009s	_{p=0.155 n=12}
_{Parse Time}	_{0.221s (± 2.83%)}	_{0.207s (± 2.96%)}	_{🟩-0.014s (- 6.52%)}	_0.187s	_0.220s	_{p=0.002 n=12}
_{Bind Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.230s (± 2.71%)}	_{0.215s (± 2.58%)}	_{🟩-0.014s (- 6.10%)}	_0.197s	_0.228s	_{p=0.001 n=12}
_{xstate-main - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,020,005	_1,020,005	_~	_~	_~	_{p=1.000 n=12}
_Types	_376,891	_376,891	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{603,405k (± 0.02%)}	_{580,063k (± 0.02%)}	_{🟩-23,342k (- 3.87%)}	_579,853k	_580,305k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,750,514 (± 0.05%)}	_{4,752,140 (± 0.05%)}	_~	_4,746,456	_4,758,960	_{p=0.198 n=12}
_{Config Time}	_0.003s	_{0.003s (± 8.64%)}	_~	_0.002s	_0.003s	_{p=0.478 n=12}
_{Parse Time}	_{0.144s (± 3.28%)}	_{0.145s (± 3.69%)}	_~	_0.135s	_0.159s	_{p=0.966 n=12}
_{Bind Time}	_{0.044s (±18.83%)}	_{0.033s (± 2.15%)}	_{🟩-0.011s (-24.86%)}	_0.032s	_0.036s	_{p=0.001 n=12}
_{Check Time}	_{1.091s (± 0.90%)}	_{1.104s (± 0.61%)}	_{+0.013s (+ 1.17%)}	_1.089s	_1.128s	_{p=0.040 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{1.293s (± 1.04%)}	_{1.292s (± 0.72%)}	_~	_1.268s	_1.328s	_{p=0.451 n=12}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
mui-docs - native
self-build-src - native
self-compiler - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₁₂
_Baseline	_baseline	₁₂

Developer Information:

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Jake Bailey (jakebailey) added 2 commits August 13, 2026 20:02

Remove AST node self pointers

2d6437e

Regenerate AST kind stringer

ee21117

Optimize generated AST casts

d1f1eb6

Generate direct AST dispatch

287f11e

Optimize generated AST dispatch

9587619

Jake Bailey (jakebailey) mentioned this pull request Aug 14, 2026

Inline GetCombinedNodeFlags and GetCombinedModifierFlags bodies #4240

Merged

Optimize hot AST accessors

7c6cf73

Jake Bailey (jakebailey) added the Unmigrated PR This PR was open at the time of the repo move back to TypeScript label Aug 14, 2026

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