Improve render preformance and reduce runtime heap use.#152

Merged

KubaO merged 35 commits into

twinbasic:mainfrom

May 22, 2026

Commits on May 21, 2026

Speed up the PDF render by another ~2.5s by getting rid of idle time.
KubaO
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Hook fast-path: skip await microtask when no async handlers.
KubaO
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Make the per-page chunker chain synchronous.
KubaO
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Use a Set for chunker loop-detection (O(n^2) -> O(n)).
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Use Range.deleteContents over extractContents when no footnotes.
KubaO
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Guard afterOverflowRemoved trigger with _assertSync.
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Guard all sync-only Hook.trigger sites with _assertSync.
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Add --no-timing flag to measure.mjs.
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Drop unused requestIdleCallback const and ResizeObserver/UUID typeof checks.
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Drop SafeUint32Array fallback and source-map hasNativeMap branches.
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Drop es5-ext Object.assign/keys/String.contains shim machinery.
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Drop es6-symbol bundle: Symbol, Array.from, Math.sign, Number.isNaN, globalThis.
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Collapse leftover polyfill aliases (sign, from, isNan, toInteger$1, isObject$1, remove$1).
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Replace UUID() with a base36 counter (~1s render saving, 1.5MB less string memory).
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Inline getBoundingClientRect/getClientRects wrappers and delete them.
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Cheaper BreakToken.toJSON: skip indexOf scan + JSON.stringify (~64ms saved).
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Fix Footnotes.renderNode always-truthy NodeList condition.
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Hook.triggerSync empty-handlers fast-path (~490ms saved).
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Footnotes unregisters its hooks when no footnotes in source (~370ms saved).
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perf/README: document the append() investigation and three landings.
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Layout.append: cache last-seen (srcParent, dest) -> destParent across sibling calls.
KubaO
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Layout.wrapContent: skip the innerHTML round-trip (~870ms saved).
KubaO
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Fix recoredCharLength typo (recoredCharLength -> recordCharLength).
KubaO
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Chunker.maxChars: propagate per page, track running max not avg (~2.9s saved).
KubaO
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Commits on May 22, 2026