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perf(parser): tokens raw deserialization use Int32Array#21137

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graphite-app[bot] merged 1 commit intomainfrom
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Apr 7, 2026
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perf(parser): tokens raw deserialization use Int32Array#21137
graphite-app[bot] merged 1 commit intomainfrom
om/04-07-perf_parser_tokens_raw_deserialization_use_int32array_

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@overlookmotel overlookmotel commented Apr 7, 2026

Continuation of #21132. Use Int32Array view of the buffer for tokens deserialization in oxc-parser.

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overlookmotel commented Apr 7, 2026


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Pull request overview

Updates the raw-transfer eager token deserializer in napi/parser to read token metadata via an Int32Array view of the shared buffer, aligning with the raw-transfer constants’ intended indexing and the performance approach introduced in #21132.

Changes:

  • Switch token metadata reads (tokens_offset, tokens_len) from buffer.uint32 to buffer.int32.
  • Switch per-token start/end reads from buffer.uint32 to buffer.int32 during eager token deserialization.

@overlookmotel overlookmotel force-pushed the om/04-07-perf_parser_tokens_raw_deserialization_use_int32array_ branch from 9de5b58 to e57c5c6 Compare April 7, 2026 16:39
@overlookmotel overlookmotel changed the base branch from graphite-base/21137 to om/04-07-perf_linter_plugins_use_int32array_s_for_tokens_and_comments_buffers April 7, 2026 16:40
@overlookmotel overlookmotel self-assigned this Apr 7, 2026
@graphite-app graphite-app Bot added the 0-merge Merge with Graphite Merge Queue label Apr 7, 2026
@graphite-app graphite-app Bot force-pushed the om/04-07-perf_linter_plugins_use_int32array_s_for_tokens_and_comments_buffers branch from 2e4846e to dc1058f Compare April 7, 2026 17:20
@graphite-app graphite-app Bot requested a review from camc314 as a code owner April 7, 2026 17:20
@graphite-app graphite-app Bot force-pushed the om/04-07-perf_parser_tokens_raw_deserialization_use_int32array_ branch from e57c5c6 to bf69e35 Compare April 7, 2026 17:20
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@graphite-app graphite-app Bot removed the 0-merge Merge with Graphite Merge Queue label Apr 7, 2026
@overlookmotel overlookmotel force-pushed the om/04-07-perf_linter_plugins_use_int32array_s_for_tokens_and_comments_buffers branch from dc1058f to e030b17 Compare April 7, 2026 23:03
@overlookmotel overlookmotel force-pushed the om/04-07-perf_parser_tokens_raw_deserialization_use_int32array_ branch from bf69e35 to 20389f1 Compare April 7, 2026 23:03
@overlookmotel overlookmotel added the 0-merge Merge with Graphite Merge Queue label Apr 7, 2026 — with Graphite App
@graphite-app graphite-app Bot changed the base branch from om/04-07-perf_linter_plugins_use_int32array_s_for_tokens_and_comments_buffers to graphite-base/21137 April 7, 2026 23:08
@graphite-app graphite-app Bot changed the base branch from graphite-base/21137 to main April 7, 2026 23:13
@github-actions github-actions Bot added A-linter Area - Linter A-cli Area - CLI A-ast-tools Area - AST tools A-linter-plugins Area - Linter JS plugins labels Apr 7, 2026
Continuation of #21132. Use `Int32Array` view of the buffer for tokens deserialization in `oxc-parser`.
@graphite-app graphite-app Bot force-pushed the om/04-07-perf_parser_tokens_raw_deserialization_use_int32array_ branch from 20389f1 to f163d10 Compare April 7, 2026 23:14
@graphite-app graphite-app Bot merged commit f163d10 into main Apr 7, 2026
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@graphite-app graphite-app Bot removed the 0-merge Merge with Graphite Merge Queue label Apr 7, 2026
@graphite-app graphite-app Bot deleted the om/04-07-perf_parser_tokens_raw_deserialization_use_int32array_ branch April 7, 2026 23:18
camc314 pushed a commit that referenced this pull request Apr 13, 2026
### 💥 BREAKING CHANGES

- 36cdc31 str: [**BREAKING**] Remove identity `FromIn` impl for `Ident`
(#21251) (overlookmotel)
- 382958a span: [**BREAKING**] Remove re-exports of string types from
`oxc_span` crate (#21246) (overlookmotel)
- c4aedfa str: [**BREAKING**] Add `static_ident!` macro (#21245)
(overlookmotel)

### 🚀 Features

- e7e1aea transformer/typescript: Add `optimize_enums` option for
regular enum inlining (#20539) (Dunqing)
- 679f57f transformer/typescript: Implement const enum inlining and
declaration removal (#20508) (Dunqing)
- 6dd061c semantic: Extend `MemberWriteTarget` to cover all property
modification patterns (#21205) (Dunqing)
- f134e24 minifier: Support `property_write_side_effects` option to drop
unused property assignments (#20773) (Dunqing)
- 75663c0 semantic: Add enum member value evaluation for const enum
support (#20602) (Dunqing)
- 3cfe8ed semantic: Add `MemberWriteTarget` flag to `ReferenceFlags`
(#20772) (Dunqing)

### 🐛 Bug Fixes

- af1a586 transformer/class-properties: Use correct property name when
converting parameter properties (#21268) (Amal Jossy)
- b43250a allocator: Move allocation tracking into `Bump` (#21342)
(overlookmotel)
- 36f505f allocator: `StringBuilder` use `Allocator::alloc_layout`
(#21340) (overlookmotel)
- 7a08a6f allocator: Fix allocation counting in
`Allocator::alloc_concat_strs_array` (#21336) (overlookmotel)
- 2338e28 ecmascript: Treat `this` as potentially having side effects
(#21297) (sapphi-red)
- bd8bd39 allocator: Remove unsafe hacks from `from_raw_parts` methods
(#21283) (overlookmotel)
- 8f4c340 allocator: Remove dangerous pointer const to mut cast (#21279)
(overlookmotel)
- aa9259f parser: Add missing error code for optional param diagnostic
(#21258) (camc314)
- 04b3c2f str: Fix unsound casting const pointers to mut pointers
(#21242) (overlookmotel)
- ceadf6c str: Make `Ident::from_raw` an unsafe function (#21241)
(overlookmotel)
- eab13b3 transformer/decorators: Avoid accessor storage name collisions
(#21106) (Dunqing)
- 07e8a30 transformer/react-refresh: Handle parenthesized variable
initializers (#21047) (camc314)

### ⚡ Performance

- c3ca6f6 allocator: `StringBuilder::from_strs_array_in` check for 0
length earlier (#21338) (overlookmotel)
- c2422bb allocator: `Allocator::alloc_concat_strs_array` check for 0
length earlier (#21337) (overlookmotel)
- 04b0fdc allocator: Mark `Allocator::alloc_layout` as
`#[inline(always)]` (#21335) (overlookmotel)
- 17aee9e allocator: Use `offset_from_unsigned` in
`ChunkFooter::as_raw_parts` (#21280) (overlookmotel)
- 61adedd minifier: Fix O(n²) perf on very many var decls (#21062)
(Gunnlaugur Thor Briem)
- addcd02 napi/parser, linter/plugins: Raw transfer deserializer for
`Vec`s use shift instead of multiply where possible (#21142)
(overlookmotel)
- 3068ded napi/parser, linter/plugins: Shift before add when calculating
positions in raw transfer deserializer (#21141) (overlookmotel)
- eb400b8 napi/parser, linter/plugins: Remove `uint32` buffer view
(#21140) (overlookmotel)
- 2675085 napi/parser: Lazy deserialization use only `Int32Array`
(#21139) (overlookmotel)
- 5b35a53 napi/parser: Deserializing tokens use only `int32` array
(#21138) (overlookmotel)
- f163d10 parser: Tokens raw deserialization use `Int32Array` (#21137)
(overlookmotel)
- 7a86613 linter/plugins: Use `Int32Array`s for tokens and comments
buffers (#21136) (overlookmotel)
- 8c51121 napi/parser, linter/plugins: Raw transfer deserialize `Span`
fields as `i32`s (#21135) (overlookmotel)
- bc1bcdd napi/parser, linter/plugins: Inline trivial raw transfer field
deserializers into node object definitions (#21134) (overlookmotel)
- c0278ab napi/parser, linter/plugins: Use `Int32Array` in raw transfer
deserializer (#21132) (overlookmotel)
- 43482c7 linter/plugins: Use `>>` not `>>>` in binary search loops
(#21129) (overlookmotel)

### 📚 Documentation

- f5e1845 allocator: Upgrade headers in doc comments for `Bump` (#21263)
(overlookmotel)
- 2870174 allocator: Upper case `SAFETY` in comments (#21253)
(overlookmotel)
- 01bc269 str: Reformat `Ident` doc comments (#21240) (overlookmotel)
- dd47359 allocator: Add doc comments for panics and errors (#21230)
(overlookmotel)
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A-ast-tools Area - AST tools A-cli Area - CLI A-linter Area - Linter A-linter-plugins Area - Linter JS plugins A-parser Area - Parser C-performance Category - Solution not expected to change functional behavior, only performance

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