XF 1.4 Forums are Slow on mobile

[mono]

Could anybody tell with what this issue could be connected? Forums seems slow when using them on smartphones with good internet connections. Especially it reflected on typing and auto-login - these always go with huge delays.
It's my own experience on Blackberry Passport, but my users also have the same problems on other devices.
As for page speed insights my score is there: http://developers.google.com/speed/pagespeed/insights/?url=rd-forum.ru&tab=mobile
Thank you.

 

[Jake Bunce]

The page analysis you linked cites some possible optimizations, but I don't feel that the cited resources would cause significant delays.

If you provide your forum URL, a test login, and instructions to reproduce the problem then I can more closely analyze your page load.

 

[mono]

@Jake Bunce Thank you. I've made some research with Android and iOS systems and found that they work fine. The problem is only with BlackBerry including xenforo.com. So I guess I should ask them.