swc-project/swc - CodSpeed

swc

Blog Docs Changelog

Performance History

Latest Results

feat(react-compiler): advance SWC upstream fixture parity (#11718) ## Summary - Continue React Compiler SWC parity work against upstream fixture expectations. - Align infer-mode function selection and fixture-entrypoint handling (including `TODO_FIXTURE_ENTRYPOINT`). - Implement and wire `drop_manual_memoization` in the compile pipeline with conservative guards. - Improve reactive-scope parity for loop/dependency handling, do-while lowering, destructuring/default normalization, and CFG peepholes used by upstream fixtures. - Extend fixture parsing normalization for Flow syntax edge cases. ## Validation - `git submodule update --init --recursive` - Targeted upstream fixture manifests for regression checks (multiple focused sets) - `RUN_UPSTREAM_FIXTURES=1 cargo test -p swc_ecma_react_compiler --test fixture fixture_cases_upstream` ## Current Status - Draft for incremental parity work. - Full upstream run is improved but not fully green yet. - Current first failing fixture during full run: - `crates/swc_ecma_react_compiler/tests/fixtures/upstream/dont-merge-if-dep-is-inner-declaration-of-previous-scope/input.js`

main

11 hours ago

fix react compiler clippy and fmt regressions

kdy1/react-compiler-parity-step1

11 hours ago

fix(cli): skip mkdir when --out-file targets the current directory (#11720) When `--out-file file.min.js` is used without a directory component, `Path::parent()` returns an empty string. Calling `create_dir_all("")` fails on Windows with EEXIST. Skip the directory creation when the parent path is empty. Closes #11717 Generated with [Claude Code](https://claude.ai/code) Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com> Co-authored-by: Donny/강동윤 <kdy1@users.noreply.github.com>

main

1 day ago

fix(cli): skip mkdir when --out-file targets the current directory When `--out-file file.min.js` is used without a directory component, `Path::parent()` returns an empty string. Calling `create_dir_all("")` fails on Windows with EEXIST. Skip the directory creation when the parent path is empty since the current directory always exists. Closes #11717 Co-authored-by: Donny/강동윤 <kdy1@users.noreply.github.com>

claude/issue-11717-20260320-0904

1 day ago

react-compiler: advance upstream fixture parity

kdy1/react-compiler-parity-step1

1 day ago

test(minifier): add issue 11645 call-arity regression fixtures

Austaras:main

1 day ago

feat(es/react-compiler): advance upstream fixture parity pipeline (#11716) ## Summary This is a strict-upstream parity follow-up for `swc_ecma_react_compiler` against the current fixture manifest baseline (`facebook/react@c80a07509582daadf275f36ffe7a88c3b12e9db4`). - align fixture harness phase execution around manifest/root handling (without phase dir duplication) - advance pipeline stage ordering in `program.rs` toward upstream `Pipeline.ts` shape - split no-op module shells into concrete pass files across `inference` / `ssa` / `optimization` / `validation` - expand constant propagation and simple DCE coverage for assignment/update normalization and alias-aware cases - tune reactive scope lowering and memoization shaping to improve fixture parity ## Scope notes - crate parity only (no `@swc/core` surface expansion in this PR) - fixture expected outputs remain upstream source-of-truth (no local output rewrites) ## Verification - `git submodule update --init --recursive` - `cargo fmt --all` - `cargo clippy --all --all-targets -- -D warnings` - `cargo test -p swc_ecma_react_compiler` - `RUN_UPSTREAM_FIXTURES=1 cargo test -p swc_ecma_react_compiler fixture_cases_upstream -- --nocapture` (fails on current known mismatch) ## Known remaining mismatch - upstream strict fixture: `createElement-freeze` - current gap: memo-block decomposition/freeze-shape parity around `React.createElement` + `shallowCopy(childProps)` ordering

main

2 days ago

feat(react-compiler): advance upstream fixture parity pipeline

kdy1/react-compiler-upstream-parity-pipeline-followup

2 days ago

Latest Branches

0%

feat(react-compiler): advance SWC upstream fixture parity#11718

11 hours ago

dadf0f5

kdy1/react-compiler-parity-step1

0%

fix(cli): skip mkdir when --out-file targets the current directory#11720

1 day ago

b3c1f62

claude/issue-11717-20260320-0904

0%

feat(es/minifier): Remove useless arguments for non inlined callee#11645

1 day ago

de7f217

Austaras:main

© 2026 CodSpeed Technology

Home Terms Privacy Docs