I just started making game with Construct 2, it ran great (constant 60FPS) on my computer (Athlon 7750 3GHz [dual core], mid end gpu), but then i tried it runing at my old computer (Celeron 2GHz [singe core], extincted gpu) but the FPS was ridiculously low, 2-4FPS. I updated the web browser, tried Firefox but the same result. To note, on this computer i can play most of the flash games that are far more complex. Ok, i gave up on my old one, so i tried it on another one (Celeron 3GHz [singe core],low end gpu), not playable at all, some of the events are not triggered since all the conditions are not met (like On Collision), hardly any 10FPS. The next computer (Celeron 3GHz [single core], low end gpu) that i have tested it had NComputing Desktop Virtualization (split one PC to more user stations, this one had 7 in total). Running flash game on all of them is not possible, but on one station is very playable. But when i tried any html5 game, same result as my old computer, 2-4FPS.
I give it to some friends, the ones with faster computers, didn't report any problems and smooth gameplay, but the ones with little less powerful reported same problems that i had.
*All of the above computers had up to date browser, and all run at least playable flash.
I read "Construct 2 vs GameMaker vs GameSalad vs Stencyl", and i think that i am missing something. That much performance difference and i can't play simple HTML5 game? I tried other html5 games from scirra arcade, but same thing, very low FPS.
Here is my game, in the top right corner you will see the FPS.
*this game is still in development, and the things you will see will not please your eyes.