Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

[jimbyo]

Describe the bug When running lighthouse-ci tests occasionally getting the error

Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory.

I have looked at a previously filed issue in lighthouse https://github.com/GoogleChrome/lighthouse/issues/11453 It mentions that if I am running multiple lighthouse tests I should be using a child process. Does lighthouse-ci use child processes to run multiple tests?

To Reproduce Steps to reproduce the behavior:

1. Set up a lighthouserc.js config, and set the number of runs to 3
2. run website server
3. Run command lhci autorun from node_modules/@lhci/cli/src/cli.js
4. See Error

Expected behavior No memory leaks to occur

Logs/Screenshots If applicable, add LHCI logs or screenshots to help explain your problem.

Environment (please complete the following information):

• OS: [iOS]
• Browser [Chrome]
• Version [88]

Additional context

[patrickhulce]

Thanks for filing @jimbyo! This isn't enough to reproduce the issue though :/ We have many uses of LHCI that run Lighthouse hundreds of times without an OOM.

Does lighthouse-ci use child processes to run multiple tests?

Yes every run is already in a separate child process.

If you're able to provide a reliable reproduction of a memory leak, we'd be happy to fix it.