perf(transformer/arrow-function): optimize generate_super_binding_name

[overlookmotel]

Optimize this function in various ways:

• Return a static Atom (rather than allocating into arena) if no property.
• Reserve capacity for ArenaString at start.
• Make path for unicode identifiers (very rare case) #[cold] and #[inline(never)].
• Slightly faster uppercase conversion.

[graphite-app]

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[overlookmotel]

• perf(transformer/arrow-function): reduce string comparisons #7318
• test(transformer/async-to-generator): failing test for nested supers #7314
• perf(transformer/arrow-functions): move arguments transform checks to aid inlining #7322
• perf(transformer/arrow-functions): store state of whether arguments needs transform #7321
• refactor(transformer/arrow-function): comments on possible improvement #7320
• refactor(transformer/arrow-function): reserve correct capacity for Vec #7319
• perf(transformer/arrow-function): create super method binding names lazily #7313
• refactor(transformer/arrow-functions): use IndexMap for super getter/setters #7317
• perf(transformer/arrow-function): optimize generate_super_binding_name #7312 👈 (View in Graphite)
• fix(transformer/arrow-function): handle unicode when capitalizing property name #7311
• refactor(transformer/arrow-function): generate_super_binding_name take &str and &TraverseCtx #7310
• fix(transformer/async-to-generator): arguments isn't correct after transformation #7234
• main

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[codspeed-hq]

CodSpeed Performance Report

Merging #7312 will not alter performance

_{Comparing 11-16-perf_transformer_arrow-function_optimize_generate_super_binding_name_ (0a24703) with main (7d75130)}

Summary

✅ 30 untouched benchmarks

[Dunqing]

Merge activity

• Nov 17, 12:02 AM EST: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Nov 17, 12:02 AM EST: A user added this pull request to the Graphite merge queue.
• Nov 17, 12:15 AM EST: The Graphite merge queue removed this pull request due to downstack failures on PR #7310.
• Nov 17, 12:16 AM EST: The Graphite merge queue removed this pull request due to downstack failures on PR #7310.
• Nov 17, 5:31 AM EST: A user added this pull request to the Graphite merge queue.
• Nov 17, 5:36 AM EST: A user merged this pull request with the Graphite merge queue.