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| author | Richard Viney <richard.viney@gmail.com> | 2024-10-08 00:16:52 +1300 |
|---|---|---|
| committer | Louis Pilfold <louis@lpil.uk> | 2024-10-07 18:19:43 +0100 |
| commit | f63d960bdc8471de501604f782011a25fbac4124 (patch) | |
| tree | 83ac3f6ae2a276561c2eb54aea1bc92dbec89128 | |
| parent | 3f821a5755a27945c06d7f67fa00888e4a3e80ee (diff) | |
| download | gleam_stdlib-f63d960bdc8471de501604f782011a25fbac4124.tar.gz gleam_stdlib-f63d960bdc8471de501604f782011a25fbac4124.zip | |
Improve JS string performance by caching the Intl Segmenter
| -rw-r--r-- | CHANGELOG.md | 2 | ||||
| -rw-r--r-- | src/gleam_stdlib.mjs | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/CHANGELOG.md b/CHANGELOG.md index 84a76b0..03c850f 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -5,6 +5,8 @@ - The `bit_array` module gains the `compare` function. - The `float` modeule gains the `to_precision` function. - The `try_fold` function in the `iterator` module is now tail recursive. +- The performance of many functions in the `string` module on the JavaScript + target has been improved. ## v0.40.0 - 2024-08-19 diff --git a/src/gleam_stdlib.mjs b/src/gleam_stdlib.mjs index 50ebb46..1c0754f 100644 --- a/src/gleam_stdlib.mjs +++ b/src/gleam_stdlib.mjs @@ -156,9 +156,12 @@ export function graphemes(string) { } } +let segmenter = undefined; + function graphemes_iterator(string) { if (globalThis.Intl && Intl.Segmenter) { - return new Intl.Segmenter().segment(string)[Symbol.iterator](); + segmenter ??= new Intl.Segmenter(); + return segmenter.segment(string)[Symbol.iterator](); } } |