Loaded up a (physics) project today that I last loaded back around the start of January, and it is much slower. Major frame rate drop. Then for the heck of it I through together a platform game with 1 obstacle and 2 collectibles, a platform, a player and 3 background objects. I'm getting about 7 FPS on chrome with WebGL on. If I turn it off WebGL, things are somewhat back to normal, about 50 FPS. I'm running XP, latest chrome, latest drivers for my Nvidia card, Pentium 4, 3.2 GHZ single core. I tried both aps in Firefox and both run slightly better than in Chrome, but not much better, not acceptably better anyway.
The more I think about this, the more I'm sure it's something to do with my PC, and not Construct2 itself. Any suggestions?