Debug should be optional

[sethillgard]

debug.boot() here (https://github.com/photonstorm/phaser/blob/1c92caad421f10707c70ad66373b3a0b4cc7f56a/src/core/Game.js#L456) significantly reduces performance on low end devices (in my case I was getting 8fps vs 27fps with debugging disabled manually by commenting out the line above). There should be a way to disable debugging when dealing with devices where it matters.

[vforsh]

When I saw this issue I was very excited but then I test this on iPhone 4 and unfortunately I didn't see any difference in fps (36 fps in both cases).
What device did you use for testing? Maybe this is device specific something.

[sethillgard]

I experienced this on a Chromecast dongle. I assume this applies to similar devices. The problem seems to be that it creates a canvas element on top of the scene.

[photonstorm]

There is now an optional flag to disable this - however I don't expect it will make any actual difference in this case.

[sethillgard]

Thank you for fixing this. I can verify that it does make a difference. Unfortunately, since you are no longer creating a debug object, this line fails:

https://github.com/photonstorm/phaser/blob/8421cfc4004d90db1a3d49eb29ec4a186d05c4e0/src/core/Game.js#L646