UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36

Steps to reproduce the problem:
1. Load attached test case, or http://test.chrislewis.codes/varfonts-memory-leak/

What is the expected behavior?
Word "Variety" should be growing and shrinking repeatedly with CSS animation.

What went wrong?
"Google Chrome Helper" process for the tab increases in memory footprint by almost 100MB/second!

Did this work before? No 

Does this work in other browsers? Yes

Chrome version: 66.0.3359.181  Channel: stable
OS Version: OS X 10.13.5
Flash Version:
 

Deleted: varfonts-memory-leak.zip 113 KB

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