JavaScript Benchmark Builder
Write two or more JavaScript snippets, run them the same number of times, and compare their real-world speed side by side.
Three steps, no setup
Write your test cases
Add multiple snippets you want to compare against each other.
Set the iteration count
Higher counts give a more stable operations-per-second reading.
Compare the results
Relative speed bars make the fastest approach obvious at a glance.
Frequently asked questions
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