Setup CodSpeed for continuous performance testing

[codspeed-hq]

Summary

This PR integrates CodSpeed into the Semantic-Next repository to enable continuous performance monitoring of the codebase. CodSpeed provides reliable performance measurements in CI environments using specialized instrumentation that eliminates environmental noise.

Changes Made

• Installed @codspeed/vitest-plugin v5.1.0 for performance benchmarking integration
• Created benchmark configuration (vitest.bench.config.js) with CodSpeed plugin
• Added example benchmarks in the benchmarks/ directory:
  • arrays.bench.js: Benchmarks for array utility functions (unique, flatten, sortBy, groupBy, intersection, difference, uniqueItems)
  • strings.bench.js: Benchmarks for string utility functions (kebabToCamel, camelToKebab, capitalize, truncate, escapeHTML, joinWords)
• Configured GitHub Actions workflow (.github/workflows/codspeed.yml):
  • Uses OIDC authentication (recommended security practice)
  • Runs in simulation mode for consistent measurements
  • Triggers on push and pull requests to main and feature branches
• Added CodSpeed badge to README.md for visibility into performance trends

Test Plan

• Benchmarks run successfully with npx vitest bench --run --config vitest.bench.config.js
• Benchmarks run successfully with CodSpeed CLI: codspeed run --mode simulation --skip-upload -- npx vitest bench --run --config vitest.bench.config.js
• All benchmarks execute and produce results for array and string utilities
• Code formatted with dprint according to repository standards
• Verify GitHub Actions workflow executes successfully
• Confirm CodSpeed reports appear on pull request
• Validate performance data is uploaded to CodSpeed dashboard

Next Steps

After this PR is merged, the team can:

1. Add more benchmarks for other critical code paths (component rendering, query operations, reactivity system)
2. Set up performance budgets and regression detection
3. Use CodSpeed flame graphs to identify optimization opportunities
4. Track performance trends across releases

The example benchmarks demonstrate CodSpeed integration and provide a foundation for comprehensive performance testing across the framework.

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Project	Deployment	Actions	Updated (UTC)
semantic-next	Ready	Preview, Comment	Feb 9, 2026 4:21am

[codspeed-hq]

Congrats! CodSpeed is installed 🎉

🆕 29 new benchmarks were detected.

You will start to see performance impacts in the reports once the benchmarks are run from your default branch.

Detected benchmarks

• escapeHTML - simple: 66.1 µs
• flatten - deeply nested: 49.1 µs
• difference - large arrays: 208.8 µs
• difference - small arrays: 66.1 µs
• flatten - nested arrays: 46.1 µs
• groupBy - small dataset: 84.7 µs
• capitalizeWords: 290 µs
• getArticle: 18.1 µs
• intersection - small arrays: 73.3 µs
• joinWords - small list: 40.5 µs
• sortBy - numeric property: 2 ms
• toTitleCase - short: 56.2 µs
• kebabToCamel - short string: 41.9 µs
• truncate - long text without word boundary: 77.1 µs
• intersection - largearrays: 280.8 µs
• sortBy - multiple keys: 3.5 ms
• toTitleCase - long: 118.8 µs
• escapeHTML - complex: 35.5 µs
• camelToKebab - long string: 28.5 µs
• camelToKebab - short string: 34.8 µs
• ...

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

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