Chrome Version: M71
OS: Chrome

What steps will reproduce the problem?
1. Go to github.com, find the linux kernel, and download the zip.
2. Open the zip files, and drag out the contents to Downloads.

What is the expected result?
Files extract reasonably quickly.

What happens instead?
Extracting files is slow.

Opening the task manager shows thousands of "idle wakeups" happening per second. I suspect there's a lot of IPC happening and not enough pipelining of operations.