Yury Selivanov @1st1.dev · Nov 24 The most recent mind blowing finding was that somehow, our branch made asyncio 25% slower on some benchmarks, which was completely unexpected for me. Here's a link to the PR by the way: github.com/python/cpyth...
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I wrote a rather involved stress microbenchmark and didn't observe any difference. Then @pablogsal.com came and did his thing, uncovering the actual culprit: asyncio.gather() got significantly slower. Something was wrong with 'lambda' functions in it.