#7587 - $.parseJSON huge performance optimization by skipping regex

[fracmak]

this checking skips the expensive regex/replace validation on the JSON when using the browser's native JSON parser because the threat to security is gone. My tests show this reduces the runtime of the parseJSON function to 1/3rd of the original code.

http://bugs.jquery.com/ticket/7587

Performance test here: http://jsperf.com/parsejson-optimization/2

[jboesch]

Those perf tests are sexy :)
I got burnt on this, but you'll need to change your spacing to use tabs instead of spaces (the if/else code blocks aren't aligned):
https://github.com/fracmak/jquery/blob/7f8623de44978be5ddcf9667741592d3520a7551/src/core.js#L521

[fracmak]

oops, sorry about that, fixed!

[rwaldron]

Please check the whitespace. http://docs.jquery.com/JQuery_Core_Style_Guidelines

[fracmak]

I think I fixed all the whitespace issues, let me know if I missed any.

[danheberden]

Simplified the process a bit in #300 - any other comments/feedback on this feature should be made there.

Thanks for getting the ball rolling and perf tests up fracmak!