I have just started to create an isometric game using javascript and html5, later I will add php and MySQL so I can make it to a proper game, now it’s just a test project. But I would like to know if there is any problems with it now, the fps you get, and how accurate the mouse is.
EDIT: ops forgot the link ^^"
http://creaturecontroller.com/battle/arena.php
Works fine here. 220fps (Chrome/W7-64/fairly shit-hot rig)
Cas 
OS X. Chrome ~180 FPS, Safari ~120, Firefox ~110, Opera ~180. Mouse is accurate in all browsers. Looking good
My PC had around 220 fps with these specs: (Win 7, GTX 970, 8GB RAM, i5-3570k CPU) - Chrome
And my laptop had 114 fps with these specs: (Win 8, i3 CPU, 4GB RAM, integrated chip) - Chrome
Seems a little low on the 1st one O.o are you limiting the FPS?
Edit: Mouse moves/acts very nice as well
Edit: Tested on my Windows phone xD 50-60fps. Nokia Lumia 735
175 FPS, using Win 8.1, cpu: AMD FX-6300 at 3.5 GHz with 8GB RAM, gpu: Radeon R7 200 series, Firefox
Im in the 180’s 4gb ram, amd fx-4100, gtx 660 - chrome
Around 220-230 FPS for me on Chrome. Around 180 FPS on Firefox. Windows 8.1. NVidia GTX 285, 8GB RAM, AMD FX 6300.
Also, looks good so far.
200-220 FPS, Chrome last version, Win7 Ultimate 64b, 8GB 1666MHz, FX-8350 Octacore, R9 270.
Mouse is moving perfectly.
No, there is no fps limit, the render function recur again the moment it’s complete.
Good to know it worked on the phone too, I will probably do phone version sometime, but the main platform will always be computers.
Strangely IE 11 performs best on my machine compared to FF and Chrome, with 315 FPS steady. Mouse accuracy also look good. IE not so bad after all? duck-run-away ;D
i7-3820QM, Nv Quadro K2000M, Canon printer and a cheap mouse
130 fps here (Firefox, 4gb ram, amd radeon hd 7650, intel core i7)
~30FPS Firefox. i3-2328 2.2Ghz, HD3000 8)
70-90 Chrome, Moto G G1
Mouse accuerate.
Around 220 FPS running in chrome on integrated grahpics.
i7 4720HQ 2.6-3.6 gHz quad core with Intel® HD 4600 Graphics.
EDIT: mouse is accurate
207 FPS - Chrome - Core 2 Duo E8200 (2x2.66GHZ) NVidia Geforce GT 240.
My 7 years old PC seems to be doing very well
~230 FPS with the latest Chrome on my rig. (Intel 4670k, NVIDIA GTX 770) It feels super smooth and the mouse is accurate, as other have mentioned. I’m excited to see where you take this. 
~210 FPS on crappy works laptop: HP, Windows 7, integrated graphics.
:persecutioncomplex: If both slow and fast hardware yield the same framerate (180-220fps), the bottleneck is not your code/graphics. Maybe you put a sleep(4) in there, skewing the result, or you’re hitting a browser bottleneck.
To get more reliable results, create a scene that is a better representation of the final game - load wise.