Bad performance of PHP(+xdebug) after sleep and waking up because of clock changing from TSC to HPET (original) (raw)

• I have tried with the latest version of my channel (Stable or Edge)
• I have uploaded Diagnostics
• Diagnostics ID: 327AD075-DF8F-491F-AF4D-200FBC3FB830/20190112205307

Expected behavior

Test scenario should always take 30s to complete

Actual behavior

Test scenario takes 30s to complete after Docker for Mac restart, and takes 1m30s-2m to complete after sleep and wakeup.

Information

• macOS Version: 10.14.1 (18B75)

I have some PHP test scenario for my application I can run to check how good or bad performance is. I also have a linux laptop to compare with. This test in docker on linux completes in 30s. When I restart Docker for Mac, it runs 30s on Docker for Mac as well, but after I put MacBook to sleep and wake it up, the very same test takes 1m30s-2m. And it would take this long until I restart Docker for Mac. After restart, this test takes 30s again. I can reproduce it very reliably every time I try. The very same issue was reported a year ago here: EugenMayer/docker-sync#524

Diagnostic logs

Docker for Mac: Version 2.0.0.0-mac81 (29211)

Steps to reproduce the behavior

1. Run something with fixed run time, see time X
2. Put Mac to sleep, wake it up
3. Run it again, see time 3X
4. Restart Docker for Mac
5. Run it again, see time X