Possible CPU usage spikes

Just upgraded our large GraphQL service to apollo-server-koa@2 and am seeing inconsistent CPU spikes all over the place. This seems to have caused inconsistent query response times (sometime queries are fast and sometimes they take many seconds).

Haven’t had a chance to dig in yet but figured it was worth reporting now. Worth noting that we rely heavily on remote schema stitching.

Mega Spikes:

[glasser]

There is not enough information here to usefully investigate. (For example, at least one of the cases above was “a user had an infinite loop in their code”.)

[artboard-studio]

@ZhimaoL In our case, the issue was not related to GraphQL, it was caused by another library we were using, which was causing infinite loops, and because NodeJS is rather dumb, we could not see any errors or warnings. All I did was to use the library on the client side, and bam, there was the error on our console.

The library that was causing the issue: https://github.com/TinyNova/deep-omit-by We fixed the infinite loop it by doing so JSON.parse(JSON.stringify(ourObject))

I hope this helps. I would suggest looking elsewhere for the source of your CPU spikes first.