That baffles me and yes, if the game is faster in the browser on your device than an apk, the problem has to be Intels XDK.
You could try on your Moto G with Android 5.1 to make an App in the XDK without Crosswalk and see if this makes a change. So you can see if its a problem with Crosswalk.
Thanks. I'll give it a try.
[quote:2sran7t6]Do you use Cordova plugins? Maybe one plugin cause a problem.
plugins: cranberry iap/revmob
I believe that phonegap/cordova cli to build the application may be the solution. I've tried it and though the process is complicated, I got it. But when I opened the xcode file, I found tons of errors. After to fix almost all of them and generated the IPA file, the ads plugin and the splash screen didn't work, but the rest worked well. I wish I could count with a good tutorial about phonegap / cordova cli, but unfortunately, who knows the process doesn't want or doesn't has a free time to share.