Benchmarks

Async iteration and operator overhead for 100,000 inputs. Bars show median elapsed seconds across 7 runs after 5 warmups; shorter is faster. Each panel has its own scale.

Node.js v24.22.0 / Bun v1.4.3 · Apple M1 Pro · Normal GC.

Chart	Workload
Sequential async map	concurrency: 1, capacity: 1
Concurrent ordered map	concurrency: 8, capacity: 16, input-order output
13-stage map/filter pipeline	ID projection followed by six increment/filter pairs, excluding multiples of 97

Inputs come from an async generator. Map callbacks await Promise.resolve(); the workloads contain no timer or network waits.

Reproduction

Requires Node.js, Bun, pnpm, and uv.

pnpm install --frozen-lockfile
pnpm bench:svg

# Re-render saved results:
pnpm bench:svg --reuse

The chart uses the default normal GC condition (--gc=none). See benchmark methodology and CLI options for individual workloads and JSON output.