Compiled executables: alias embedded bytecode instead of copying it; smaller, page-friendly bytecode (WebKit#494) - #40201

Merged

Jarred-Sumner merged 48 commits into

mainfrom

claude/bytecode-cache-borrow

Aug 24, 2026

Commits on Aug 23, 2026

Mark bytecode embedded in a compiled executable as persistent so JSC aliases it instead of copying
Jarred-Sumner
committed
f7d2f84
[autofix.ci] apply automated fixes
autofix-ci[bot]
authored
0cc77af
Standalone modules come through the builtin path: mark their bytecode persistent regardless of isBuiltin; pin WebKit#494 head; test captures stderr
Jarred-Sumner
committed
a324bf0
Record each embedded module's source hash at build time so loading it from bytecode never reads the source text
Jarred-Sumner
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648960c
Pin WebKit#494 head (per-block checksums)
Jarred-Sumner
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28e2abf
Pin WebKit#494 head
Jarred-Sumner
committed
a858d77
Merge remote-tracking branch 'origin/main' into claude/bytecode-cache-borrow
Jarred-Sumner
committed
6c249b8
[autofix.ci] apply automated fixes
autofix-ci[bot]
authored
d73aa70
Pin WebKit#494 head (cpuid fix)
Jarred-Sumner
committed
e300c28
Pin WebKit#494 head
Jarred-Sumner
committed
fb82aa3
Pin WebKit#494 head
Jarred-Sumner
committed
53b434b
Pin WebKit#494 head
Jarred-Sumner
committed
4365029
ci: retrigger (WebKit preview 738c4bc9 published)
Jarred-Sumner
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8418a9e
bun-build-compile test: size the payload check off the source, not an absolute 20 MB (the new cache format halves the bytecode)
Jarred-Sumner
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897a92c
bun-build-compile residency test: include the mapping's smaps fields in the failure message
Jarred-Sumner
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6f683bb
Drop the payload-residency test: Rss of a just-written executable's mapping depends on the agent's page-cache folio policy (dirty folios mapped wholesale on the ASAN agent), not on what the process…
Jarred-Sumner
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e61ee8f
Bump WebKit to 024831d80fa0 (bytecode cache: borrow, region layout, compact format, checksums)
Jarred-Sumner
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517e48b
Remove stray comment left from the dropped residency test
Jarred-Sumner
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2de1d82
ResolvedSource: say explicitly when bytecode_cache is never freed (executable section, retired compile-cache blob) instead of inferring it from needsDeref
Jarred-Sumner
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4861e28
Mark compile-cache bytecode static on the other two paths that use it
Jarred-Sumner
committed
2384d71
Bump WebKit to 62f427b86ffb (bytecode cache: arrays-first records, string dedup, steps-backed metadata tables)
Jarred-Sumner
committed
909fa9d
Bump WebKit to fc1a8df1bba4 (bytecode cache: inline short strings, alias long strings)
Jarred-Sumner
committed
7aa74fd

Commits on Aug 24, 2026