mirror of
https://github.com/danbulant/oxc
synced 2026-05-24 20:32:10 +00:00
e42ac3a2a0
Introduce new method `ConcatSourceMapBuilder::from_sourcemaps`.
Where all the sourcemaps being concatenated exist at time that you
create `ConcatSourceMapBuilder`, it's faster to use `from_sourcemaps`,
because it pre-allocates enough space for the data it will hold and so
avoids memory copying.
Before:
```rs
let mut builder = ConcatSourceMapBuilder::default();
builder.add_sourcemap(&sourcemap1, 0);
builder.add_sourcemap(&sourcemap2, 100);
builder.add_sourcemap(&sourcemap3, 100);
let combined = builder.into_sourcemap();
```
After:
```rs
let builder = ConcatSourceMapBuilder::from_sourcemaps(&[
(&sourcemap1, 0),
(&sourcemap2, 100),
(&sourcemap3, 200),
]);
let combined = builder.into_sourcemap();
```
44 lines
1.8 KiB
Rust
44 lines
1.8 KiB
Rust
use oxc_allocator::Allocator;
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use oxc_benchmark::{criterion_group, criterion_main, BenchmarkId, Criterion};
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use oxc_codegen::{CodeGenerator, CodegenReturn};
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use oxc_parser::Parser;
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use oxc_sourcemap::ConcatSourceMapBuilder;
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use oxc_span::SourceType;
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use oxc_tasks_common::TestFiles;
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#[allow(clippy::cast_possible_truncation)]
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fn bench_sourcemap(criterion: &mut Criterion) {
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let mut group = criterion.benchmark_group("sourcemap");
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for file in TestFiles::complicated_one(1).files() {
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let id = BenchmarkId::from_parameter(&file.file_name);
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let source_type = SourceType::from_path(&file.file_name).unwrap();
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group.bench_with_input(id, &file.source_text, |b, source_text| {
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let allocator = Allocator::default();
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let ret = Parser::new(&allocator, source_text, source_type).parse();
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let CodegenReturn { source_text: output_txt, .. } = CodeGenerator::new()
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.enable_source_map(file.file_name.as_str(), source_text)
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.build(&ret.program);
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let lines = output_txt.matches('\n').count() as u32;
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b.iter(|| {
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let CodegenReturn { source_map, .. } = CodeGenerator::new()
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.enable_source_map(file.file_name.as_str(), source_text)
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.build(&ret.program);
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if let Some(sourcemap) = source_map {
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let concat_sourcemap_builder = ConcatSourceMapBuilder::from_sourcemaps(&[
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(&sourcemap, 0),
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(&sourcemap, lines),
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]);
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concat_sourcemap_builder.into_sourcemap().to_json_string();
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}
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});
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});
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}
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group.finish();
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}
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criterion_group!(sourcemap, bench_sourcemap);
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criterion_main!(sourcemap);
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