| commit | 4247806690801cba0699552b711dbfdb943d05d2 | [log] [tgz] |
|---|---|---|
| author | Chuanqi Xu <yedeng.yd@linux.alibaba.com> | Fri May 05 16:29:23 2023 +0800 |
| committer | Chuanqi Xu <yedeng.yd@linux.alibaba.com> | Fri May 05 17:00:40 2023 +0800 |
| tree | ab476164ab51ace80eb1d872ea92412eb9c891f0 | |
| parent | de24d084597a819992bc2e769b88597c9e28b47c [diff] |
[NFC] [Coroutines] Add a fastpath when computing the cross suspend point information Mitigate https://github.com/llvm/llvm-project/issues/62348 The root cause for the above issue is that we used a textbook dataflow analysis for the cross suspend point information. The analysis is powerful but not scaling. It is not easy to improve the current algorithm and the patch tries to prune some branches to mitigate the problems. Before the patch: ``` n: 20000 real 0m11.081s user 0m10.597s sys 0m0.320s n: 40000 real 0m32.927s user 0m31.403s sys 0m1.043s n: 60000 real 1m2.145s user 0m58.903s sys 0m2.268s n: 80000 real 1m47.143s user 1m41.630s sys 0m3.857s n: 100000 real 2m34.758s user 2m26.587s sys 0m5.922s ``` After the patch: ``` n: 20000 real 0m10.418s user 0m9.945s sys 0m0.311s n: 40000 real 0m27.884s user 0m26.430s sys 0m1.036s n: 60000 real 0m52.420s user 0m49.321s sys 0m2.267s n: 80000 real 1m25.389s user 1m20.247s sys 0m3.856s n: 100000 real 2m4.275s user 1m56.405s sys 0m5.975s ``` This patch intended to be a NFC patch.
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