[Merged by Bors] - Optimize String.prototype.normalize
#2848
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jedel1043
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HalidOdat,
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nekevss
Test262 conformance changes
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## main #2848 +/- ##
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- Coverage 50.92% 50.92% -0.01%
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Files 419 419
Lines 41780 41799 +19
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+ Hits 21278 21286 +8
- Misses 20502 20513 +11
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raskad
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Apr 22, 2023
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@jedel1043 I did not look into it much, do you think we could do the same for the |
Yep! There's the |
HalidOdat
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Apr 23, 2023
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bors r+ |
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Apr 23, 2023
We currently use `unicode_normalization` to handle the `String.prototype.normalize` method. However, the crate doesn't support UTF-16 as a first class string, so we had to do some hacks by converting the valid parts of a string to UTF-8, normalizing each one, encoding back to UTF-16 and concatenating everything with the unpaired surrogates within. All of this is obviously suboptimal for performance, which is why I leveraged the `icu_normalizer`, which does support UTF-16 input, to replace our current implementation. Additionally, this allows users to override the default normalization data if the `intl` feature is enabled by providing the required data in the `BoaProvider` data provider.
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String.prototype.normalizeString.prototype.normalize
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Apr 24, 2023
As mentioned in #2848 (comment), this uses our new default ICU4X data to replace `char::is_start` and `char::is_continue` from the `boa_unicode` crate with the [`icu_properties`](https://crates.io/crates/icu_properties) crate. Note that this doesn't deprecate `boa_unicode` yet, since that'll require some discussion about how to proceed with a now unused sub-crate.
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We currently use
unicode_normalizationto handle theString.prototype.normalizemethod. However, the crate doesn't support UTF-16 as a first class string, so we had to do some hacks by converting the valid parts of a string to UTF-8, normalizing each one, encoding back to UTF-16 and concatenating everything with the unpaired surrogates within. All of this is obviously suboptimal for performance, which is why I leveraged theicu_normalizer, which does support UTF-16 input, to replace our current implementation.Additionally, this allows users to override the default normalization data if the
intlfeature is enabled by providing the required data in theBoaProviderdata provider.