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Title: perf(fmt): reuse compiled gitignore rules and release traversal state by chenjiahan · Pull Request #590 · rstackjs/rstack-cli · GitHub

Open Graph Title: perf(fmt): reuse compiled gitignore rules and release traversal state by chenjiahan · Pull Request #590 · rstackjs/rstack-cli

X Title: perf(fmt): reuse compiled gitignore rules and release traversal state by chenjiahan · Pull Request #590 · rstackjs/rstack-cli

Description: Motivation Monorepos often repeat the same .gitignore contents across packages. rs fmt currently compiles each copy independently and leaves native matcher cleanup to garbage collection. Changes Share compiled rules by exact contents using Arc, while keeping each directory's matching state independent. Explicitly release compiled rules and directory caches after traversal, including failure paths, once all concurrent traversals have settled. Benchmarked on a large monorepo with 56,583 formatted files and 258 .gitignore sources (60 unique contents), using Node.js 22.16.0, 8 workers, no format cache, and the same patched Prettier 3.9.10 in both variants: Metric Before After File discovery, median of 8 fresh processes 420.9 ms 358.2 ms Matcher live allocations before cleanup 37.9 MiB 12.8 MiB Whole-repository check, median of 10 fresh processes 16.75 s 16.73 s Discovery is 14.9% faster; whole-repository timings are effectively unchanged within run-to-run variation. Allocation tracking confirms explicit cleanup releases matcher data to the same level as dropping the matcher. With 258 distinct contents, the cache adds about 114 KiB. Validation: Rust and formatting-related tests passed, along with lint, type, and format checks. All 59,817 discovery requests, 38,556 replayed native call results, and existing benchmark diagnostics match the baseline.

Open Graph Description: Motivation Monorepos often repeat the same .gitignore contents across packages. rs fmt currently compiles each copy independently and leaves native matcher cleanup to garbage collection. Changes Sh...

X Description: Motivation Monorepos often repeat the same .gitignore contents across packages. rs fmt currently compiles each copy independently and leaves native matcher cleanup to garbage collection. Changes Sh...

Opengraph URL: https://github.com/rstackjs/rstack-cli/pull/590

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db53640 perf(fmt): reuse compiled gitignore rules and release traversal state chenjiahan Oct 22, 2026 https://github.com/rstackjs/rstack-cli/pull/590/commits/db53640552791b830cbde96db3eb3bd4cb7fe4c8
627d9d6 test(fmt): simplify gitignore reuse and cleanup coverage chenjiahan Oct 22, 2026 https://github.com/rstackjs/rstack-cli/pull/590/commits/627d9d6821f4c2d29490cf8899dd3d10db6bb5d2
2c65523 perf(fmt): skip settled load draining after successful traversal chenjiahan Oct 22, 2026 https://github.com/rstackjs/rstack-cli/pull/590/commits/2c65523e14c6e4f7d0d5cecab00ffcfd0e839c62
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