[issue44283] Add jump table for certain safe match-case statements

[Dennis Sweeney]

Dennis Sweeney <sweeney.dennis650 at gmail.com> added the comment:

Here are some benchmarks:

PS C:\Users\sween\Source\Repos\cpython2\cpython> .\python.bat -m pyperf compare_to .\main.json .\PR-26697.json
Running Release|x64 interpreter...
1: Mean +- std dev: [main] 117 us +- 4 us -> [PR-26697] 122 us +- 3 us: 1.04x slower
2: Mean +- std dev: [main] 202 us +- 11 us -> [PR-26697] 180 us +- 7 us: 1.12x faster
3: Mean +- std dev: [main] 320 us +- 11 us -> [PR-26697] 243 us +- 13 us: 1.32x faster
4: Mean +- std dev: [main] 474 us +- 15 us -> [PR-26697] 306 us +- 15 us: 1.55x faster
5: Mean +- std dev: [main] 625 us +- 27 us -> [PR-26697] 341 us +- 6 us: 1.83x faster
6: Mean +- std dev: [main] 806 us +- 24 us -> [PR-26697] 404 us +- 20 us: 1.99x faster
7: Mean +- std dev: [main] 1.01 ms +- 0.04 ms -> [PR-26697] 461 us +- 19 us: 2.19x faster
8: Mean +- std dev: [main] 1.22 ms +- 0.03 ms -> [PR-26697] 538 us +- 20 us: 2.27x faster
9: Mean +- std dev: [main] 1.47 ms +- 0.05 ms -> [PR-26697] 607 us +- 27 us: 2.42x faster
10: Mean +- std dev: [main] 1.75 ms +- 0.07 ms -> [PR-26697] 666 us +- 36 us: 2.62x faster

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Added file: https://bugs.python.org/file50106/matchperf.py

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<https://bugs.python.org/issue44283>
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