perf: optimize sourcemap ignore list with fast path for static string | RegExp #6313
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## Linux > OS: Linux 6.9 Pop!_OS 22.04 LTS > CPU: (32) x64 AMD Ryzen 9 5950X 16-Core Processor > Memory: 37.53 GB / 62.67 GB <img width="1779" height="353" alt="image" src="https://github.com/user-attachments/assets/8bd46cb6-1bd5-485a-9d6b-a1c543cada07" />
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sourcemap_ignore_list js function callstring | RegExp
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## [1.0.0-beta.40] - 2025-09-24 ⚡ Sourcemap Performance Boost - 20%-30% faster sourcemap generation - Consistent gains across all platforms ### 🚀 Features - rolldown: oxc v0.92.0 (#6322) by @Boshen - adding partial `MagicString` binding (#6289) by @IWANABETHATGUY - rolldown_plugin_vite_html: initialize (#6292) by @shulaoda ### 🐛 Bug Fixes - rolldown_plugin_react_refresh_wrapper: avoid using cwd to allow using as a callable plugin (#6318) by @sapphi-red - rolldown_plugin_transform: resolve tsconfig from absolute path (#6311) by @shulaoda ### 🚜 Refactor - Construct MagicString with `Cow<str>` instead of `&str` (#6288) by @IWANABETHATGUY - throw error if generating oxc runtime helper fails (#6291) by @shulaoda ### 📚 Documentation - add more description about sourcemapIgnoreList (#6314) by @IWANABETHATGUY ### ⚡ Performance - reduce `sourcemap_ignore_list` js function call (#6313) by @IWANABETHATGUY - string_wizard: use memchr to find patterns in `replace` (#6312) by @IWANABETHATGUY - simplify sourcemap token processing in collapse_sourcemaps (#6310) by @IWANABETHATGUY - rolldown: some minor perf optimization (#6306) by @Brooooooklyn - rolldown: fine-tuning the tokio scheduler (#6272) by @Brooooooklyn ### ⚙️ Miscellaneous Tasks - deps: lock file maintenance rust crates (#6302) by @renovate[bot] - deps: lock file maintenance npm packages (#6301) by @renovate[bot] - use `lto: thin` in profile mode for better profiling experience. (#6320) by @IWANABETHATGUY - adjust the tokio runtime config in bench (#6305) by @Brooooooklyn - deps: update dependency rolldown-plugin-dts to v0.16.8 (#6307) by @renovate[bot]
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Linux
Adding a static
string | RegExpvalue for optionsoutput.sourcemapIgnoreListwhich reduces a lot of unnecessary rust -> js function call, so that performance got improved whensourcemapis enabled.