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perf(jit): V8/Bun roadmap and P0-P4 implementation - #30

Merged

huacnlee merged 71 commits into

mainfrom

docs/v8-bun-roadmap

Sep 29, 2026

Merged

perf(jit): V8/Bun roadmap and P0-P4 implementation#30
huacnlee merged 71 commits into
mainfrom
docs/v8-bun-roadmap

Commits on Sep 27, 2026
- bench: add shared-js-multibatch-v3 timing protocol
  
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- perf(jit): make helper-boundary validation O(1)
  
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- perf(jit): link effectful field-writing callees transactionally
  
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- perf(jit): let Tier 2 callers wait for an in-flight linked callee
  
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- perf(jit): guard typed-array receivers held in locals
  
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- perf(jit): add callback-free native entry for steady functions
  
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- perf(jit): eliminate redundant guards and frame sync in guarded property loops
  
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- docs: record p4a guard-elimination slice and remaining work
  
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- test(jit): cover packed local receivers; document P1-6 slice
  
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- feat(jit): admit closures in Tier 1 (fclosure, var refs, close_loc, set_name)
  
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- perf(jit): bounded polymorphic property inline caches
  
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- bench(jit): add property-polymorphic kernel and P4c slice notes
  
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- docs: record the P1 call-path slice, diagnostics and remaining work
  
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- docs(roadmap): record P2a closure slice, evidence and remaining work
  
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- perf(jit): native Tier 1 exception regions and async probe shutdown
  
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- perf(jit): lower for-of/for-in iteration opcodes in Tier 1
  
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- perf(jit): add Tier 1 object-literal and Array push leaf fast paths
  
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- perf(jit): tighten Tier 2 scalar loop code
  
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- docs: record P4d scalar codegen slice and noisy diagnostics
  
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- test(jit): production, OSR and async-probe coverage for exception regions
  
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- perf(jit): carry typed/packed loop metadata and fold literal tags in Tier 2
  
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- sys: pin the refcount header layout for inline DUP/FREE (patch 0022)
  
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- perf(jit): inline DUP/FREE reference counting in Tier 1 and Tier 2
  
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  582c7e2
- docs: record P1.3 inline refcount slice and remaining work
  
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- perf(jit): skip unread backtraces when natively catching primitives
  
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- bench: add typed-convert-traversal diagnostic and P4b status note
  
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- feat(jit): admit common rejected opcodes through an exact GENERIC_OP helper
  
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- perf(jit): keep the Tier 2 candidate scan off the exception check
  
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- docs(jit): record p2c-exceptions diagnostics and verification
  
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- docs: design the P3a native-to-native call convention
  
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- sys: add patch 0029 with native-call chain support functions
  
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- perf(jit): run pure self-recursion as native-to-native calls
  
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- perf(jit): settle Tier 1 functions that Tier 2 can never translate
  
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- fix(jit): keep lexical TDZ exact in Tier 2 after the uninitialized join
  
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- fix(jit): keep closure-creating functions out of automatic Tier 1
  
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- refactor(sys): publish the GENERIC_OP root context out of line
  
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- fix(jit): revalidate outer hoisted tuples at inner loop polls
  
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- bench: add methods-dynamic workload and record the P2b slice
  
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- fix(jit): settle only functions that use newly admitted Tier 1 opcodes
  
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- fix(jit): keep frame inlining at sites Tier 2 cannot link directly
  
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- fix(jit): keep bounds checks when a load's receiver provenance differs from its hoist
  
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- docs: correct the P2b settle scope and refresh its diagnostics
  
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- fix(jit): make metadata-only typed hoists exit-free
  
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- fix(jit): compile try regions whose handlers no exception edge reaches
  
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- docs(jit): record p2c-exceptions r1 review fixes and diagnostics
  
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- fix(jit): deliver native-chain interrupts exactly once and unstick the stack floor
  
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- merge: perf/p0-bench-protocol
  
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- merge: perf/p1a-helper-boundary
  
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- merge: perf/p1b-inline-refcount
  
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- merge: perf/p1c-call-path
  
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- merge: perf/p1d-typedarray-receivers-r1
  
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- merge: perf/p4d-scalar-codegen
  
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- merge: perf/p4a-guard-elim
  
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- merge: perf/p4b-bce-r1
  
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- docs(perf): add V8/Bun gap attribution and P0-P5 roadmap
  
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- merge: perf/p4c-poly-ic
  
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- merge: perf/p3b-effectful-direct-r1
  
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- fix(jit): do not cache Tier 2 deferrals that wait on a callee compile
  
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- merge: perf/p2a-closures-r1
  
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- merge: perf/p2b-misc-ops-r1
  
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- merge: perf/p2c-exceptions-r1
  
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- merge: perf/p2d-iteration-r1
  
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- merge: perf/p3a-native-calls-r1
  
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- merge: perf/p4e-alloc-fastpath
  
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- merge: roadmap P0-P4 integration (perf/roadmap-integration)
  
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Commits on Sep 28, 2026
- fix(jit): repair CI build gates, MSan typed-array guard, and stuck Tier 2 callers
  
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- fix(jit): unpoison object leaf inputs under MSan and bound refcount test deadline
  
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- fix(jit): unpoison for-of leaf inputs and harden tests for slow builds
  
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Commits on Sep 29, 2026
- fix(jit): prune retired feedback, cancel retired compile jobs, keep untranslatable baselines
  
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- test(jit): give the sanitizer sort-comparator steady wait 120 s
  
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- fix(jit): drop the Tier 2 vocabulary gate for untranslatable baselines
  
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  216e88e

Commits

Commits on Sep 27, 2026

Commits on Sep 28, 2026

Commits on Sep 29, 2026