perf(transformer/jsx): skip creating temp String

[overlookmotel]

Small optimization. JSXNamespacedName::to_string creates a temporary String which is then immediately copied into the arena.

Use AstBuilder::atom_from_strs_array instead to construct the string directly in arena. It's probably also cheaper than the write! formatter machinery that impl Display for JSXIdentifier uses.

[overlookmotel]

• feat(ast_tools): AstBuilder generator support types with more than 1 Atom field #10737
• refactor(ast)!: AstBuilder methods require an Atom with correct lifetime #10735
• perf(minifier): avoid temp Strings and copying string data #10733
• perf(isolated_declaration): avoid copying string data #10732
• perf(transformer): avoid copying string data #10726
• perf(transformer/regexp): avoid copying string data and temp String #10723
• perf(transformer/jsx): skip creating temp String #10721 👈 (View in Graphite)
• feat(span): introduce format_atom! macro #10722
• main

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #10721 will create unknown performance changes

_{Comparing 04-30-perf_transformer_jsx_skip_creating_temp_string_ (2256918) with main (b01cb45)}

Summary

🆕 36 new benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
🆕	codegen[checker.ts]	N/A	22.2 ms	N/A
🆕	codegen_sourcemap[checker.ts]	N/A	65.2 ms	N/A
🆕	formatter[antd.js]	N/A	714 ms	N/A
🆕	formatter[react.development.js]	N/A	8.1 ms	N/A
🆕	formatter[typescript.js]	N/A	1.1 s	N/A
🆕	isolated-declarations[vue-id.ts]	N/A	58.4 ms	N/A
🆕	lexer[RadixUIAdoptionSection.jsx]	N/A	21.6 µs	N/A
🆕	lexer[antd.js]	N/A	24.1 ms	N/A
🆕	lexer[cal.com.tsx]	N/A	5.8 ms	N/A
🆕	lexer[checker.ts]	N/A	14.4 ms	N/A
🆕	lexer[pdf.mjs]	N/A	3.9 ms	N/A
🆕	linter[RadixUIAdoptionSection.jsx]	N/A	2.7 ms	N/A
🆕	linter[cal.com.tsx]	N/A	1.2 s	N/A
🆕	linter[checker.ts]	N/A	3.1 s	N/A
🆕	mangler[antd.js]	N/A	15.9 ms	N/A
🆕	mangler[react.development.js]	N/A	293.5 µs	N/A
🆕	mangler[typescript.js]	N/A	39.5 ms	N/A
🆕	minifier[antd.js]	N/A	163.6 ms	N/A
🆕	minifier[react.development.js]	N/A	1.8 ms	N/A
🆕	minifier[typescript.js]	N/A	287.9 ms	N/A
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

[coderabbitai]

Walkthrough

The change updates the transformation logic for JSX namespaced element names in the codebase. Instead of converting the entire namespaced name into a string in one step, the new approach constructs the string literal by explicitly concatenating the namespace part, a colon character, and the local name part. This is achieved using a method that joins these parts into a single string literal. No changes were made to the declarations of exported or public entities. The modification is limited to how namespaced JSX element names are processed internally during transformation.

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📒 Files selected for processing (1)

• crates/oxc_transformer/src/jsx/jsx_impl.rs (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• crates/oxc_transformer/src/jsx/jsx_impl.rs

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[graphite-app]

Merge activity

• May 1, 2:37 AM EDT: Boshen added this pull request to the Graphite merge queue.
• May 1, 2:48 AM EDT: Merged by the Graphite merge queue.