perf: various optimization with ast walk#2969
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🦋 Changeset detectedLatest commit: 7bb4bd2 The changes in this PR will be included in the next version bump. This PR includes changesets to release 3 packages
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##### [v4.7.2](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.7.2) ##### Patch Changes - fix: resolve tsgo bin path with package.json ([#3074](sveltejs/language-tools#3074)) - fix: report tsconfig errors in --tsgo-experimental-api ([#3070](sveltejs/language-tools#3070)) ##### [v4.7.1](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.7.1) ##### Patch Changes - fix: correctly parse --tsgo-experimental-api flag ([#3067](sveltejs/language-tools#3067)) ##### [v4.7.0](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.7.0) ##### Minor Changes - feat: add `--config` option ([#3066](sveltejs/language-tools#3066)) - feat: svelte-check tsgo support with experimental api ([#3036](sveltejs/language-tools#3036)) ##### Patch Changes - fix: load esm version of Vite ([#3065](sveltejs/language-tools#3065)) - fix: stop excluding workspaces under dot-prefixed ancestors ([#3037](sveltejs/language-tools#3037)) - Updated dependencies \[[`7a3464b`](sveltejs/language-tools@7a3464b), [`a2561fc`](sveltejs/language-tools@a2561fc)]: - [@sveltejs/load-config](https://github.com/sveltejs/load-config)@0.2.0 ##### [v4.6.0](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.6.0) ##### Minor Changes - feat: support reading Svelte config from `vite.config.js/ts` ([#3031](sveltejs/language-tools#3031)) ##### Patch Changes - Updated dependencies \[[`151cf45`](sveltejs/language-tools@151cf45)]: - [@sveltejs/load-config](https://github.com/sveltejs/load-config)@0.1.1 ##### [v4.5.0](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.5.0) ##### Minor Changes - feat: support Svelte 5 declaration tags ([#3033](sveltejs/language-tools#3033)) ##### Patch Changes - fix: properly handle props with the name `slot` inside Svelte 5 snippets ([#3030](sveltejs/language-tools#3030)) - feat: add support for svelte config ts/mts files ([#3009](sveltejs/language-tools#3009)) ##### [v4.4.8](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.8) ##### Patch Changes - feat: typescript 6.0 support ([#2985](sveltejs/language-tools#2985)) ##### [v4.4.7](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.7) ##### Patch Changes - fix: flush stdout/stderr before exit ([#3014](sveltejs/language-tools#3014)) - fix: report diagnostics in tsconfig.json ([#3005](sveltejs/language-tools#3005)) ##### [v4.4.6](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.6) ##### Patch Changes - fix: prevent config loading message in svelte-check --incremental ([#2974](sveltejs/language-tools#2974)) - fix: resolve svelte files with NodeNext in --incremental/tsgo ([#2990](sveltejs/language-tools#2990)) - perf: various optimization with ast walk ([#2969](sveltejs/language-tools#2969)) - fix: prevent error with escape sequence in attribute ([#2968](sveltejs/language-tools#2968)) - fix: typescript 6.0 compatibility ([#2988](sveltejs/language-tools#2988)) ##### [v4.4.5](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.5) ##### Patch Changes - fix: use Promise<Response> for async kit handler return types ([#2966](sveltejs/language-tools#2966)) ##### [v4.4.4](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.4) ##### Patch Changes - fix: more robust detection of `lang="ts"` attribute ([#2957](sveltejs/language-tools#2957)) - fix: pass filename to `warningFilter` ([#2959](sveltejs/language-tools#2959)) - fix: resolve svelte files under path alias in `--incremental/tsgo` mode ([#2955](sveltejs/language-tools#2955)) ##### [v4.4.3](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.3) ##### Patch Changes - fix: respect `@ts-ignore` etc comments within tags ([#2950](sveltejs/language-tools#2950)) ##### [v4.4.2](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.2) ##### Patch Changes - fix: resolve shims correctly in `--incremental/tsgo` mode ([`cd1ff2f`](sveltejs/language-tools@cd1ff2f)) - fix: include `references` in generated `tsconfig.json` in `--incremental/tsgo` mode ([`1990f74`](sveltejs/language-tools@1990f74)) ##### [v4.4.1](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.1) ##### Patch Changes - fix: handle relative imports reaching outside working directory when using `--incremental/--tsgo` flags ([#2942](sveltejs/language-tools#2942)) - fix: support SvelteKit zero types in svelte-check --incremental ([#2939](sveltejs/language-tools#2939)) ##### [v4.4.0](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.0) ##### Minor Changes - feat: provide `--incremental` and `--tsgo` flags ([#2932](sveltejs/language-tools#2932)) ##### Patch Changes - fix: ignore Unix domain sockets in file watcher to prevent crashes ([#2931](sveltejs/language-tools#2931)) - fix: properly use machine output by default for Claude Code ([`e9f58d2`](sveltejs/language-tools@e9f58d2)) ##### [v4.3.6](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.3.6) ##### Patch Changes - fix: don't hoist type/snippet referencing $store ([#2926](sveltejs/language-tools#2926))
renovate Bot
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Jul 25, 2026
##### [v4.7.3](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.7.3) ##### Patch Changes - feat: zero-config `+error.svelte` props ([#3076](sveltejs/language-tools#3076)) ##### [v4.7.2](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.7.2) ##### Patch Changes - fix: resolve tsgo bin path with package.json ([#3074](sveltejs/language-tools#3074)) - fix: report tsconfig errors in --tsgo-experimental-api ([#3070](sveltejs/language-tools#3070)) ##### [v4.7.1](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.7.1) ##### Patch Changes - fix: correctly parse --tsgo-experimental-api flag ([#3067](sveltejs/language-tools#3067)) ##### [v4.7.0](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.7.0) ##### Minor Changes - feat: add `--config` option ([#3066](sveltejs/language-tools#3066)) - feat: svelte-check tsgo support with experimental api ([#3036](sveltejs/language-tools#3036)) ##### Patch Changes - fix: load esm version of Vite ([#3065](sveltejs/language-tools#3065)) - fix: stop excluding workspaces under dot-prefixed ancestors ([#3037](sveltejs/language-tools#3037)) - Updated dependencies \[[`7a3464b`](sveltejs/language-tools@7a3464b), [`a2561fc`](sveltejs/language-tools@a2561fc)]: - [@sveltejs/load-config](https://github.com/sveltejs/load-config)@0.2.0 ##### [v4.6.0](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.6.0) ##### Minor Changes - feat: support reading Svelte config from `vite.config.js/ts` ([#3031](sveltejs/language-tools#3031)) ##### Patch Changes - Updated dependencies \[[`151cf45`](sveltejs/language-tools@151cf45)]: - [@sveltejs/load-config](https://github.com/sveltejs/load-config)@0.1.1 ##### [v4.5.0](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.5.0) ##### Minor Changes - feat: support Svelte 5 declaration tags ([#3033](sveltejs/language-tools#3033)) ##### Patch Changes - fix: properly handle props with the name `slot` inside Svelte 5 snippets ([#3030](sveltejs/language-tools#3030)) - feat: add support for svelte config ts/mts files ([#3009](sveltejs/language-tools#3009)) ##### [v4.4.8](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.8) ##### Patch Changes - feat: typescript 6.0 support ([#2985](sveltejs/language-tools#2985)) ##### [v4.4.7](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.7) ##### Patch Changes - fix: flush stdout/stderr before exit ([#3014](sveltejs/language-tools#3014)) - fix: report diagnostics in tsconfig.json ([#3005](sveltejs/language-tools#3005)) ##### [v4.4.6](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.6) ##### Patch Changes - fix: prevent config loading message in svelte-check --incremental ([#2974](sveltejs/language-tools#2974)) - fix: resolve svelte files with NodeNext in --incremental/tsgo ([#2990](sveltejs/language-tools#2990)) - perf: various optimization with ast walk ([#2969](sveltejs/language-tools#2969)) - fix: prevent error with escape sequence in attribute ([#2968](sveltejs/language-tools#2968)) - fix: typescript 6.0 compatibility ([#2988](sveltejs/language-tools#2988)) ##### [v4.4.5](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.5) ##### Patch Changes - fix: use Promise<Response> for async kit handler return types ([#2966](sveltejs/language-tools#2966)) ##### [v4.4.4](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.4) ##### Patch Changes - fix: more robust detection of `lang="ts"` attribute ([#2957](sveltejs/language-tools#2957)) - fix: pass filename to `warningFilter` ([#2959](sveltejs/language-tools#2959)) - fix: resolve svelte files under path alias in `--incremental/tsgo` mode ([#2955](sveltejs/language-tools#2955)) ##### [v4.4.3](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.3) ##### Patch Changes - fix: respect `@ts-ignore` etc comments within tags ([#2950](sveltejs/language-tools#2950)) ##### [v4.4.2](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.2) ##### Patch Changes - fix: resolve shims correctly in `--incremental/tsgo` mode ([`cd1ff2f`](sveltejs/language-tools@cd1ff2f)) - fix: include `references` in generated `tsconfig.json` in `--incremental/tsgo` mode ([`1990f74`](sveltejs/language-tools@1990f74)) ##### [v4.4.1](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.1) ##### Patch Changes - fix: handle relative imports reaching outside working directory when using `--incremental/--tsgo` flags ([#2942](sveltejs/language-tools#2942)) - fix: support SvelteKit zero types in svelte-check --incremental ([#2939](sveltejs/language-tools#2939)) ##### [v4.4.0](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.4.0) ##### Minor Changes - feat: provide `--incremental` and `--tsgo` flags ([#2932](sveltejs/language-tools#2932)) ##### Patch Changes - fix: ignore Unix domain sockets in file watcher to prevent crashes ([#2931](sveltejs/language-tools#2931)) - fix: properly use machine output by default for Claude Code ([`e9f58d2`](sveltejs/language-tools@e9f58d2)) ##### [v4.3.6](https://github.com/sveltejs/language-tools/releases/tag/svelte-check%404.3.6) ##### Patch Changes - fix: don't hoist type/snippet referencing $store ([#2926](sveltejs/language-tools#2926))
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Found this while benchmarking a large file for #2963. Turns out the
getChildren()method parses part of the file again to include syntax nodes such as keywords or parentheses. Some of our use cases don't need these nodes.Another one is switching the order of
svelteNodeAtandcharCode.charCodeis generally very fast, so checking it first can be faster.