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perf(sourcemap): ConcatSourceMapBuilder extend source_contents in separate loop (#4634)

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Small optimization to source map concatenation. Check if input sourcemap has `source_contents` once, rather than on each turn of the loop.
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overlookmotel 2024-08-05 01:26:12 +00:00
parent 0d2c41a2cb
commit 372316bf87
1 changed files with 6 additions and 5 deletions
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11
crates/oxc_sourcemap/src/concat_sourcemap_builder.rs
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@ -46,11 +46,12 @@ impl ConcatSourceMapBuilder {
}
// Extend `sources` and `source_contents`.
self.sources.reserve(sourcemap.sources.len());
for (index, source) in sourcemap.get_sources().enumerate() {
let source_content = sourcemap.get_source_content(index as u32).unwrap_or_default();
self.sources.push(source.into());
self.source_contents.push(source_content.into());
self.sources.extend(sourcemap.get_sources().map(Into::into));
if let Some(source_contents) = &sourcemap.source_contents {
self.source_contents.extend(source_contents.iter().map(AsRef::as_ref).map(Into::into));
} else {
self.source_contents.extend((0..sourcemap.sources.len()).map(|_| Arc::default()));
}
// Extend `names`.