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by _urga
2542 days ago
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I had a similar experience with Node, which took months to track down. I noticed something was blocking our event loop for between 200ms to 2 seconds at a time. I assumed it was GC and optimized everything off-heap but the issue remained. It turned out Node's async spawn() is not async, and blocks while it copies the page table. For processes with large RSS, this adds up. https://github.com/nodejs/node/issues/14917 |
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