[tombert]

Wow, I wonder why Firefox is so much slower? Quantum seems pretty zippy overall, but maybe that's largely due to fast rendering speeds?

Does anyone on the Spidermonkey team have some insight?

[opencl]

https://bugzilla.mozilla.org/show_bug.cgi?id=1366287

The open issues this bug depends on is a pretty good list of bigint-related performance enhancements that haven't been implemented yet.

[war1025]

Looks like they are using big integers, which I'd guess isn't something that comes up a lot, so probably hasn't been optimized for too much.

[ehsankia]

It is pretty new, and as you mention not many websites use them yet, so I'm sure there are more important optimizations the Firefox team is focusing on for now.

[Porygon]

What is benchmarked here is basically the performance of the division operation on big integers and does not represent the general performance of a browser for everyday tasks.