angular material animation performance , md-icon issue on Chrome - google-chrome

Question

I am building Android application using Angularjs, Angular material and Cordova.
Can somebody help on below issues. Can someone suggest tips/tricks to improve/fix below points?
Issue ~1:
Animations are very very slow on android device. Mainly ripple effects/animations given to md-button are slow. See below Html .
Code:
<div>
<md-content>
<md-list>
<md-item ng-repeat="item in tags">
<md-item-content>
<md-button class="md-grid-item-content tile"
aria-label="{{item.name}}"
ui-sref="crop({cropId: item.id})">
<div class="md-tile-center">
<img ng-src="{{item.imageSource}}" class="face" alt="{{item.name}}" height="64" width="64">
</div>
</md-button>
<div class="md-tile-content">
<h3>{{item.name}}</h3>
<h4>{{item.text}}</h4>
</div>
</md-item-content>
</md-item>
</md-list>
</md-content>
</div>
Issue ~2:
Multiple click on md-button makes application not responding. Does not give intuition of which button is active or focus.
Issue ~3:
I observed that with Crome browser on Laptop, there are few problems for demo site also (https://material.angularjs.org), md-button icons are not visible. However same works in firefox. May be md-icon has changed in new build?
See : Git issue 1177