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Compares String.prototype.indexOf against String.prototype.includes for substring searches.

Safari

4.00 msSnippet A

A 4.0 · B 5.0

Firefox

8.00 msSnippet A

A 8.0 · B 8.0

Chrome

24.50 msSnippet A

A 24.5 · B 24.5

String.prototype.startsWith performance

Firefox

1.00 ms

Chrome

14.40 ms

Safari

20.00 ms

Compares a classic indexed for loop against Array.prototype.forEach for summing an array.

Chrome

13.70 msSnippet A

A 13.7 · B 39.3

Compares String.prototype.startsWith against an anchored regular expression for prefix matching.

Safari

6.00 msSnippet B

A 23.0 · B 6.0

Firefox

7.00 msSnippet A

A 7.0 · B 32.0

Chrome

19.00 msSnippet A

A 19.0 · B 31.0