Weird performance issue with charts drawing SVG

I have a weird performance issue w/ ionic2/angular2. Please see demo code on GitHub. Could you take a look at it and comment what goes wrong?

How to reproduce

git clone https://github.com/daixtrose/ionic2-performance-issue-demo
cd ionic2-performance-issue-demo
npm install
ionic serve

and to confirm it is device-independent:

ionic run android

See the update of the demo in this pull request