parseInt vs unary plus vs Number() number coercion

JavaScript performance comparison

Revision 2 of this test case created on 19th October 2012

Info

parseInt in the first case has to receive the second parameter to set the base to decimal, otherwise 0 will be returned, due the fact he will try to parse an octal number.

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Testing in unknown unknown
Test		Ops/sec
parseInt 1	`parseInt("09", 10)`	pending…
unary plus 1	`+"09"`	pending…
parseInt 2	`parseInt("10")`	pending…
unary plus 2	`+"10"`	pending…
Number constructor 1	`Number("09")`	pending…
Number constructor 2	`Number("10")`	pending…

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

Revision 1: published on 24th September 2012
Revision 2: published on 19th October 2012
Revision 3: published by Phil Booth on 17th January 2013
Revision 4: published on 27th January 2013