Slow performance on mobile

Hi for all. 

I'm trying to create application for mobile devices. I have some troubles with tag <meta name='viewport'>:

1. I have 59-60 fps if i set attribute content like this: content='initial-scale=no,width=device-width,initial-scale=1';  but images looks blured.

2. Images looks great if i set attribute content like this: content='initial-scale=no,width=device-width,initial-scale=' + 1 / window.devicePixelRatio;  but i have 15 fps.

I set options.resolution = window.devicePixelRatio || 1 for both cases;