Benchmarks

All benchmarks run on Node.js with tinybench. Results are reproducible — run pnpm bench locally to verify.

Summary

Utility	vs lodash	vs radash	vs native
arrayToHash / keyBy	on par	on par	on par
chunk	4.9x faster	on par	on par
groupBy	1.3x faster	on par	1.1x slower
unique (by key)	2.7x faster	1.6x faster	on par
pick	3.3x faster	on par	—

Environment

• Machine: arm64
• Runtime: Node.js v25.2.1
• OS: darwin 24.3.0
• Benchmark tool: tinybench v6

Running benchmarks

pnpm bench

This runs all benchmarks across multiple dataset sizes (small, medium, large) and outputs a comparison table.

Adding benchmarks for a new utility

Each utility has its own benchmark file at src/<category>/<util-name>/index.bench.ts. Benchmarks compare against lodash, radash, and native JavaScript equivalents using the getDatasets() helper for consistent dataset sizes.

See the Contributing guide for the benchmark file template.