We can do a lot better on Kraken/json-stringify-tinderbox!
json-stringify-tinderbox 63.370+-3.319 ^ 56.031+-3.150 ^ definitely 1.1310x faster
Created attachment 252461 [details]
Attachment 252461 [details] did not pass style-queue:
Total errors found: 1 in 2 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Created attachment 252462 [details]
Comment on attachment 252462 [details]
View in context: https://bugs.webkit.org/attachment.cgi?id=252462&action=review
> + NumberToStringBuffer buffer;
> + builder.append(numberToString(number, buffer));
StringBuilder has a function named appendECMAScriptNumber. I suggest you use that instead, which would make your patch even smaller.
Committed r183874: <http://trac.webkit.org/changeset/183874>