I have created my game in Construct2 but one issue I have is every 4 seconds or so the sprites jerk slightly in the game. There are only 5 or 6 sprites on the screen.
I have also reduced the collision points to the absolute minimum - between 4 and 6.
Each sprite is 120x65. There are 5 frames repeating at a speed of 7 but even with just 1 frame it still jerks.
No particles/effects/scale/flip/blend modes used.
I have tried everything to reduce this and it occurs on my PC in Firefox (or IE). Same issue on my iPad (iPad4 - 1024mb RAM, retina display).
Using the CocoonJS app I get 62FPS. I have built the game in the Cocoon cloud and the issue is also there.
I am using r139 64 bit, OpenGL 3.3.11672.
The game - download size 19.3 mb, memory use 158mb (was 173mb but after optimizing I have it down to 158).
Background image - 122kb
Layers - 4 (bg, main, HUD, Touch controls)
Use loader layout - No
Pixel rounding - On
Preview browser (default)
Fullscreen in browser - Scale
Use iOS retina display - All devices
Enable WebGL - On
Sampling - point
Clear backgrround - No
My PC - Win 7 64 3Ghz, 3Gb RAM, ATI Radeon HD 4800 (latest driver).
So I'm stuck right now - please help!