In Tom's Hardware Guide's June 2013 Grand Prix, Firefox 21 beat Chrome 27 on Dromaeo overall, but we are slower on some individual tests cases. http://www.tomshardware.com/reviews/chrome-27-firefox-21-opera-next,3534-6.html We have some existing bugs about Dromaeo perf.

On my MacBook Pro, Firefox 28 is significant slower that Chrome 32 on some test cases (but wins overall due to a couple extremely favorable results for DOM jQuery). * Are these all known issues? I see that we have bugs for some of these test cases. http://dromaeo.com/?id=208890,208893 Test Fx28 Cr32 Factor ---- ---- ---- ------- Base64 516 1057 2.0x Bitwise And 2412 7391 3.1x Compute Bits in Byte 4256 17749 4.2x DNA Sequence Counting 222 463 2.1x DOM Attributes (Prototype) 630 1367 2.2x DOM Modification (Prototype) 209 424 2.0x DOM Style (Prototype) 184 387 2.1x Prime Number Computation 844 1723 2.0x RayTracer 203 625 3.1x Regular Expressions 279 908 3.3x String Parsing/Searching 187 567 3.0x Traversing Binary Trees 485 2891 6.0x

Marking all tracking bugs which haven't been updated since 2014 as INCOMPLETE. If this bug is still relevant, please reopen it and move it into a bugzilla component related to the work being tracked. The Core: Tracking component will no longer be used.