Upgrade Effect to rc.110

[SandroMaglione]

Summary

• Upgrade the exact effect peer and development dependency to 4.0.0-rc.110
• Upgrade companion @effect/vitest and @effect/atom-react packages across the root and examples
• Refresh all committed lockfiles and the documented install command

Changeset

• Added or updated for a library or package-metadata change
• Not required because this PR does not change src/ or package.json

Validation

• pnpm check
• Relevant example checks, when examples changed
• Automated type-performance measurement passed or was not required
• Automated runtime- and memory-performance measurement passed or was not required

Local validation completed with pnpm check, pnpm check in platformer, playground, and pokemon, pnpm perf:types, and pnpm perf:runtime. The CI base-versus-PR performance comparisons remain authoritative.

[github-actions]

Type performance

Measured with TypeScript 6.0.3 and skipLibCheck=true.

Scenario	Base	PR	Difference
Effect only	55	55	0 (0.0%)
Import effect-machine	55	55	0 (0.0%)
Machine.states (3 states)	3,039	3,039	0 (0.0%)
Machine.make (3 states, 2 events)	10,759	10,759	0 (0.0%)
machine.handle (3 states, 2 transitions)	28,192	28,192	0 (0.0%)
fluent transition (10 named branches)	106,006	106,006	0 (0.0%)
fluent invocation (state-dependent Effect)	92,756	92,756	0 (0.0%)
machine.handle (depth 24)	192,588	192,588	0 (0.0%)
machine.handle (wide depth 16)	220,950	220,950	0 (0.0%)
machine.handle (parallel/history/choice)	128,389	128,389	0 (0.0%)
machine definition (3 independent implementations)	127,342	127,342	0 (0.0%)
machine exact input/output/error/services	113,924	113,924	0 (0.0%)
execution adapter readiness	120,582	120,582	0 (0.0%)

Marginal instantiations are measured against the matching setup without that API call:

Scenario	Base	PR	Difference
Import effect-machine	0	0	0
Machine.states (3 states)	2,984	2,984	0 (0.0%)
Machine.make (3 states, 2 events)	7,712	7,712	0 (0.0%)
machine.handle (3 states, 2 transitions)	17,433	17,433	0 (0.0%)
fluent transition (10 named branches)	95,757	95,757	0 (0.0%)
fluent invocation (state-dependent Effect)	83,491	83,491	0 (0.0%)
machine.handle (depth 24)	171,892	171,892	0 (0.0%)
machine.handle (wide depth 16)	201,461	201,461	0 (0.0%)
machine.handle (parallel/history/choice)	108,126	108,126	0 (0.0%)
machine definition (3 independent implementations)	111,373	111,373	0 (0.0%)
machine exact input/output/error/services	99,413	99,413	0 (0.0%)
execution adapter readiness	90,770	90,770	0 (0.0%)

Check times (informational)

Scenario	Base	PR
Effect only	0.03s	0.03s
Import effect-machine	0.03s	0.03s
Machine.states (3 states)	0.09s	0.09s
Machine.make (3 states, 2 events)	0.15s	0.15s
machine.handle (3 states, 2 transitions)	0.24s	0.23s
fluent transition (10 named branches)	0.47s	0.48s
fluent invocation (state-dependent Effect)	0.46s	0.47s
machine.handle (depth 24)	0.75s	0.75s
machine.handle (wide depth 16)	0.75s	0.76s
machine.handle (parallel/history/choice)	0.60s	0.58s
machine definition (3 independent implementations)	0.60s	0.59s
machine exact input/output/error/services	0.55s	0.55s
execution adapter readiness	0.54s	0.55s

Type instantiations are the comparison metric. Check time varies with runner load and is informational only.

[github-actions]

Runtime performance

Median of 5 independent benchmark processes on AMD EPYC 7763 64-Core Processor with Node v24.19.0.

Pull request baseline

Scenario	Effect Machine
Plan counter transitions	113,100 transitions/s
Drain burst with terminal fence	346,737 increments/s
Drain burst with a change observer	326,793 increments/s
Lookup and send to one child	289,548 increments/s
Start and stop a machine	140,390 machines/s
Start and stop a parent with one child	27,219 families/s
Plan transitions through a compound state	97,590 transitions/s
Plan transitions through parallel regions	79,691 transitions/s
Drain burst through a compound state	297,757 events/s
Drain burst through two parallel regions	301,638 events/s
Drain a compound-state burst with a change observer	281,088 events/s

Process runtime reference points

Scenario	Effect Machine
Start and stop a raw generic process	14,831 processes/s
Start and stop a raw compiled process	61,162 processes/s

Memory profile	Effect Machine
Idle machine	1.8 KiB
Raw generic managed process	13.9 KiB
Raw compiled process	3.1 KiB
Two independent idle machines	3.4 KiB
Idle parent with one child	5.8 KiB
Parent with observed child registry	10.0 KiB
Parent with observed invoked child snapshots	6.3 KiB

Effect Machine change from base

Metric	Base	Base variability	PR	PR variability	Difference
Plan counter transitions	113,302 transitions/s	0.4% MAD	113,100 transitions/s	0.8% MAD	-0.2%
Drain burst with terminal fence	345,934 increments/s	0.9% MAD	346,737 increments/s	0.8% MAD	+0.2%
Drain burst with a change observer	326,891 increments/s	1.4% MAD	326,793 increments/s	0.4% MAD	-0.0%
Lookup and send to one child	286,341 increments/s	1.8% MAD	289,548 increments/s	0.7% MAD	+1.1%
Start and stop a machine	139,606 machines/s	0.7% MAD	140,390 machines/s	1.1% MAD	+0.6%
Start and stop a parent with one child	26,874 families/s	2.1% MAD	27,219 families/s	1.4% MAD	+1.3%
Plan transitions through a compound state	96,556 transitions/s	1.9% MAD	97,590 transitions/s	1.5% MAD	+1.1%
Plan transitions through parallel regions	78,362 transitions/s	2.5% MAD	79,691 transitions/s	1.5% MAD	+1.7%
Drain burst through a compound state	295,315 events/s	1.2% MAD	297,757 events/s	0.6% MAD	+0.8%
Drain burst through two parallel regions	296,646 events/s	0.6% MAD	301,638 events/s	0.0% MAD	+1.7%
Drain a compound-state burst with a change observer	280,860 events/s	1.1% MAD	281,088 events/s	1.0% MAD	+0.1%
Idle machine heap per unit	1.8 KiB	0.0% MAD	1.8 KiB	0.0% MAD	0.0%
Raw generic managed process heap per unit	13.9 KiB	0.0% MAD	13.9 KiB	0.0% MAD	+0.0%
Raw compiled process heap per unit	3.2 KiB	0.1% MAD	3.1 KiB	0.0% MAD	-0.7%
Two independent idle machines heap per unit	3.4 KiB	0.0% MAD	3.4 KiB	0.0% MAD	-0.0%
Idle parent with one child heap per unit	5.8 KiB	0.0% MAD	5.8 KiB	0.0% MAD	0.0%
Parent with observed child registry heap per unit	10.0 KiB	0.0% MAD	10.0 KiB	0.0% MAD	-0.0%
Parent with observed invoked child snapshots heap per unit	6.3 KiB	0.1% MAD	6.3 KiB	0.0% MAD	+0.1%

Process runtime reference change from base

Metric	Base	Base variability	PR	PR variability	Difference
Start and stop a raw generic process	15,096 processes/s	0.6% MAD	14,831 processes/s	2.5% MAD	-1.8%
Start and stop a raw compiled process	61,233 processes/s	1.2% MAD	61,162 processes/s	1.6% MAD	-0.1%

Regression guard

No large, noise-adjusted throughput or heap regressions detected.

Versions and interpretation

• Effect Machine: 0.18.0

Higher throughput is better; lower heap is better. Variability is the median absolute deviation across independent processes, relative to their median. Small differences on shared GitHub-hosted hardware remain informational; the required guard rejects only large changes beyond the measured noise allowance.