Can anyone think of a reason why addChild would be very slow?
I have some code like this:
for (i=0; i<100; i++) {
infoSprite = new CInfoSprite(this);
CProfiler.start("addChild");
CCanvasManager.canvasSelections.addChild(infoSprite);
CProfiler.finish("addChild");
}
The output from the profiler looks like this:
profile ‘addChild’ took 14 millis
profile ‘addChild’ took 15 millis
profile ‘addChild’ took 17 millis
profile ‘addChild’ took 18 millis
profile ‘addChild’ took 19 millis
profile ‘addChild’ took 19 millis
profile ‘addChild’ took 18 millis
profile ‘addChild’ took 18 millis
profile ‘addChild’ took 20 millis
profile ‘addChild’ took 20 millis
profile ‘addChild’ took 21 millis
profile ‘addChild’ took 20 millis
profile ‘addChild’ took 21 millis
profile ‘addChild’ took 21 millis
profile ‘addChild’ took 22 millis
profile ‘addChild’ took 22 millis
profile ‘addChild’ took 25 millis
profile ‘addChild’ took 25 millis
profile ‘addChild’ took 28 millis
profile ‘addChild’ took 26 millis
profile ‘addChild’ took 29 millis
profile ‘addChild’ took 29 millis
profile ‘addChild’ took 30 millis
profile ‘addChild’ took 30 millis
profile ‘addChild’ took 32 millis
profile ‘addChild’ took 34 millis
profile ‘addChild’ took 34 millis
profile ‘addChild’ took 34 millis
profile ‘addChild’ took 36 millis
profile ‘addChild’ took 35 millis
profile ‘addChild’ took 36 millis
profile ‘addChild’ took 38 millis
profile ‘addChild’ took 38 millis
profile ‘addChild’ took 39 millis
profile ‘addChild’ took 38 millis
profile ‘addChild’ took 40 millis
profile ‘addChild’ took 41 millis
profile ‘addChild’ took 42 millis
profile ‘addChild’ took 43 millis
profile ‘addChild’ took 42 millis
profile ‘addChild’ took 43 millis
profile ‘addChild’ took 46 millis
profile ‘addChild’ took 45 millis
profile ‘addChild’ took 46 millis
profile ‘addChild’ took 46 millis
profile ‘addChild’ took 48 millis
profile ‘addChild’ took 48 millis
profile ‘addChild’ took 48 millis
profile ‘addChild’ took 48 millis
profile ‘addChild’ took 48 millis
profile ‘addChild’ took 50 millis
profile ‘addChild’ took 50 millis
profile ‘addChild’ took 51 millis
profile ‘addChild’ took 51 millis
profile ‘addChild’ took 51 millis
profile ‘addChild’ took 52 millis
profile ‘addChild’ took 55 millis
profile ‘addChild’ took 53 millis
profile ‘addChild’ took 59 millis
profile ‘addChild’ took 66 millis
profile ‘addChild’ took 55 millis
profile ‘addChild’ took 55 millis
profile ‘addChild’ took 56 millis
profile ‘addChild’ took 57 millis
profile ‘addChild’ took 58 millis
profile ‘addChild’ took 57 millis
profile ‘addChild’ took 57 millis
profile ‘addChild’ took 59 millis
profile ‘addChild’ took 61 millis
profile ‘addChild’ took 61 millis
profile ‘addChild’ took 60 millis
profile ‘addChild’ took 59 millis
profile ‘addChild’ took 60 millis
profile ‘addChild’ took 60 millis
profile ‘addChild’ took 62 millis
profile ‘addChild’ took 62 millis
profile ‘addChild’ took 62 millis
profile ‘addChild’ took 63 millis
profile ‘addChild’ took 63 millis
profile ‘addChild’ took 64 millis
profile ‘addChild’ took 63 millis
profile ‘addChild’ took 65 millis
profile ‘addChild’ took 65 millis
profile ‘addChild’ took 67 millis
profile ‘addChild’ took 66 millis
profile ‘addChild’ took 66 millis
profile ‘addChild’ took 66 millis
profile ‘addChild’ took 67 millis
profile ‘addChild’ took 69 millis
profile ‘addChild’ took 70 millis
profile ‘addChild’ took 70 millis
profile ‘addChild’ took 71 millis
profile ‘addChild’ took 70 millis
profile ‘addChild’ took 71 millis
profile ‘addChild’ took 72 millis
profile ‘addChild’ took 71 millis
profile ‘addChild’ took 71 millis
profile ‘addChild’ took 72 millis
profile ‘addChild’ took 72 millis
profile ‘addChild’ took 73 millis
So not only is it very slow, it gets incrementally slower with each call. The whole thing takes over 6 seconds for these 100 objects being added. 100 sounds like a lot but Ive done other projects where Ive added 1000+ objects without any major slowdown like this.
