⚡️ Implement action as a pure iterator

[cowboyd]

Motivation

action() is a hot path and any savings to be. had here will payoff in multiples.

Approach

We can implement action as a direct Iterable using a Do() effect and not pay the overhead of allocating a generator frame.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/effection@1175

commit: 3ecb15a

[codspeed-hq]

Merging this PR will improve performance by 26.95%

⚡ 1 improved benchmark
✅ 5 untouched benchmarks
⏩ 18 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Memory	effection.events	156 KB	122.9 KB	+26.95%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing iterator-action (3ecb15a) with v4 (d326678)}

Footnotes

1. 18 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩