Severe performance degradation for tracing under 3.11 #93516
Description
Bug report
Coverage.py is seeing a significant increase in overhead for tracing code in 3.11 compared to 3.10: nedbat/coveragepy#1287
As an example:
| cov | proj | python3.10 | python3.11 | 3.11 vs 3.10 |
|---|---|---|---|---|
| none | bug1339.py | 0.184 s | 0.142 s | 76% |
| none | bm_sudoku.py | 10.789 s | 9.901 s | 91% |
| none | bm_spectral_norm.py | 14.305 s | 9.185 s | 64% |
| 6.4.1 | bug1339.py | 0.450 s | 0.854 s | 189% |
| 6.4.1 | bm_sudoku.py | 27.141 s | 55.504 s | 204% |
| 6.4.1 | bm_spectral_norm.py | 36.793 s | 67.970 s | 184% |
(This is the output of lab/benchmark.py.)
Your environment
- CPython versions tested on: 3.10, 3.11
- Operating system and architecture: MacOS, Intel