Bad performance on tablet

[TnT0923]

Hi,

I just started using phaser to make a game.

All image size in this game are designed based on the background image which is 1600*900 pixel.

After that I resized the canvas into 1400*800 pixel.

When I try to add 400 sprites to the game at the same times, it takes about 3~4 seconds to finish the render.  (I'm using for loop and addChild to Phaser.Sprite)

after that, the game acted laggy.

My question is:

1) Is there any different between "game.add.sprite" and " var a = new sprite();  game.add.existing(a);"

2) How many sprites can exist on the view at the same time without making the game laggy?

3) Is game performance related to image size?

 

Thanks a lot. 

[mikiex]

You are creating new sprites and not using a pool of sprites? That might be why?