421 lines
8.1 KiB
Markdown
421 lines
8.1 KiB
Markdown
# Performance
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<!-- .slide: data-background="static/background.jpg" -->
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- cProfile
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- pstats
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::: notes
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Se présenter.
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# Le code
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```python
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def main():
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already_checked = []
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while True:
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c = "".join(choice(ascii_letters) for _ in range(10))
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if c in already_checked: continue
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already_checked.append(c)
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digest = sha512(
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(c + args.string).encode("UTF-8")).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({c} + {args.string}) = {digest}")
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sys.exit(0)
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print("Searching")
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```
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## Premiers tests
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```bash
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$ time python perf.py AFPy 00
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Searching
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[...]
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Searching
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Found: sha512(5NX3dB0BrO + AFPy) = 00…
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real 0m0.048s
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user 0m0.040s
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sys 0m0.008s
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```
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## Premiers tests
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```bash
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$ time python perf.py AFPy 000
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Searching
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[...]
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Searching
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Found: sha512(UYb0z6nac1 + AFPy) = 000…
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real 0m2.797s
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user 0m2.773s
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sys 0m0.024s
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```
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## Premiers tests
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```bash
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$ time python perf.py AFPy 0000
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Searching
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[...]
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Searching
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Found: sha512(dX0oAzvOmm + AFPy) = 0000…
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real 0m16.381s
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user 0m16.375s
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sys 0m0.004s
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```
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C'est long mais ça passe …
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## Premiers tests
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```bash
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$ time python perf.py AFPy 00000
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Searching
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[...]
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Searching
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Searching
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Searching
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Searching
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```
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Bon, on a un sushi.
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## cProfile
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```bash
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$ python -m cProfile -o prof perf.py AFPy 0000
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```
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## pstats
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```bash
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$ python -m pstats prof
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Welcome to the profile statistics browser.
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prof% sort cumulative
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prof% stats 10
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```
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## pstats
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```txt
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ncalls cumtime percall filename:lineno(function)
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12/1 17.007 17.007 {built-in method builtins.exec}
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1 17.007 17.007 /tmp/perf.py:1(<module>)
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1 16.996 16.996 /tmp/perf.py:20(main)
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36429 0.869 0.000 {method 'join' of 'str' objects}
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```
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## snakeviz
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```bash
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$ pip install snakeviz
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Collecting snakeviz
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Using cached snakeviz-2.1.0-py2.py3-none-any.whl (282 kB)
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Collecting tornado>=2.0
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Using cached tornado-6.1-cp39-cp39-manylinux2010_x86_64.whl (427 kB)
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Installing collected packages: tornado, snakeviz
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Successfully installed snakeviz-2.1.0 tornado-6.1
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```
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## snakeviz
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```bash
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$ snakeviz prof
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```
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## snakeviz
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![](static/snakeviz-v1.png)
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## vprof
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```
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$ pip install vprof
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Collecting vprof
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Using cached vprof-0.38-py3-none-any.whl (319 kB)
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Collecting psutil>=3
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Using cached psutil-5.7.3-cp39-cp39d-linux_x86_64.whl
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Installing collected packages: psutil, vprof
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Successfully installed psutil-5.7.3 vprof-0.38
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```
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## vprof
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```
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$ vprof -c h "perf.py AFPy 0000"
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```
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## vprof
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![](static/vprof.png)
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# Le code, v1
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```python [2,5,6]
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def main():
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already_checked = []
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while True:
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c = "".join(choice(ascii_letters) for _ in range(10))
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if c in already_checked: continue
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already_checked.append(c)
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digest = sha512(
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(c + args.string).encode("UTF-8")).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({c} + {args.string}) = {digest}")
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sys.exit(0)
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print("Searching")
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```
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# Le code, v2
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```python [2,5,6]
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def main():
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already_checked = set()
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while True:
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c = "".join(choice(ascii_letters) for _ in range(10))
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if c in already_checked: continue
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already_checked.add(c)
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digest = sha512(
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(c + args.string).encode("UTF-8")).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({c} + {args.string}) = {digest}")
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sys.exit(0)
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print("Searching")
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```
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## Les perfs
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```bash
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$ hyperfine 'python perf.py AFPy 00000'
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```
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- v1 : ∞
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- v2 (`set`) : 23 s ± 23 s
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::: notes
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Il existe aussi pyperf: https://github.com/psf/pyperf
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## cProfile + pstats
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```bash
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$ python -m cProfile -o prof perf.py AFPy 0000
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$ python -m pstats prof
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```
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## cProfile + pstats
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```
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ncalls cumtime percall filename:lineno(function)
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12/1 1.156 1.156 {built-in method builtins.exec}
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1 1.156 1.156 perf.py:1(<module>)
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1 1.143 1.143 perf.py:35(main)
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34215 0.771 0.000 {method 'join' of 'str' objects}
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371647 0.681 0.000 perf.py:39(<genexpr>)
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337860 0.526 0.000 /python3.9/random.py(choice)
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337860 0.283 0.000 /python3.9/random.py(randbelow)
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33786 0.134 0.000 built-in method print
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372745 0.037 0.000 method 'getrandbits' of Random'
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33786 0.037 0.000 method 'hexdigest' of hashlib
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```
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## snakeviz
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```bash
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$ snakeviz prof
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```
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## snakeviz
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![](static/snakeviz-v2.png)
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## Le code, v2
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```python [4]
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def main():
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already_checked = set()
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while True:
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c = "".join(choice(ascii_letters) for _ in range(10))
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if c in already_checked: continue
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already_checked.add(c)
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digest = sha512(
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(c + args.string).encode("UTF-8")).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({c} + {args.string}) = {digest}")
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sys.exit(0)
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print("Searching")
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```
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# Le code, v3
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```python [4]
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def main():
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already_checked = set()
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while True:
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c = "".join(choices(ascii_letters, k=10))
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if c in already_checked: continue
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already_checked.add(c)
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digest = sha512(
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(c + args.string).encode("UTF-8")).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({c} + {args.string}) = {digest}")
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sys.exit(0)
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print("Searching")
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```
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## Les perfs
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```bash
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$ hyperfine 'python perf.py AFPy 00000'
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```
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- v1 : ∞
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- v2 (`set`) : 23 s ± 23 s
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- v3 (`choices`): 8.591 s ± 6.525 s
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## snakeviz
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![](static/snakeviz-v3.png)
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# Le code, v4
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```python [3]
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def main():
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already_checked = set()
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for c in product(ascii_letters, repeat=10):
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c = "".join(c)
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if c in already_checked: continue
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already_checked.add(c)
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digest = sha512(
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(c + args.string).encode("UTF-8")).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({c} + {args.string}) = {digest}")
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sys.exit(0)
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print("Searching")
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```
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## Les perfs
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```bash
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$ hyperfine 'python perf.py AFPy 00000'
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```
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- v1 : ∞
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- v2 (`set`) : 23 s ± 23 s
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- v3 (`choices`): 8.591 s ± 6.525 s
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- v4 (`deterministic`) : 3.900 s ± 0.121 s
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## snakeviz
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![](static/snakeviz-v4.png)
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# Le code, v5
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```python [12]
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def main():
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already_checked = set()
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for c in product(ascii_letters, repeat=10):
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c = "".join(c)
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if c in already_checked: continue
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already_checked.add(c)
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digest = sha512(
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(c + args.string).encode("UTF-8")).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({c} + {args.string}) = {digest}")
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sys.exit(0)
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# print("Searching")
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```
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## Les perfs
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```bash
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$ hyperfine 'python perf.py AFPy 00000'
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```
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- v1 : ∞
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- v2 (`set`) : 23 s ± 23 s
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- v3 (`choices`): 8.591 s ± 6.525 s
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- v4 (`deterministic`) : 3.900 s ± 0.121 s
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- v5 (`print`) : 3.120 s ± 0.062 s
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## Snakeviz
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![](static/snakeviz-v5.png)
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Il reste du `hexdigest`, du `encode`, et du `join`.
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## vprof
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![](static/vprof2.png)
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Ligne 26 et 28 !?
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# Le code, v6
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```python
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def main():
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for c in product(ascii_letters, repeat=10):
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c = "".join(c)
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digest = sha512(
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(c + args.string).encode("UTF-8")).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({c} + {args.string}) = {digest}")
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sys.exit(0)
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```
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## Snakeviz
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![](static/snakeviz-v6.png)
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Il reste du `hexdigest`, du `encode`, et du `join`.
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# Le code, v7
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```python
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def main():
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string = args.string.encode("UTF-8")
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pool = ascii_letters.encode("UTF-8")
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for c in product(pool, repeat=10):
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digest = sha512(bytes(c) + string).hexdigest()
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if digest.startswith(args.sha_prefix):
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print(f"sha512({bytes(c)} + {args.string}) = "
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f"{digest}")
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sys.exit(0)
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```
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## Les perfs
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```bash
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$ hyperfine 'python perf.py AFPy 00000'
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```
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- v1 : ∞
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- v2 (`set`) : 23 s ± 23 s
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- v3 (`choices`): 8.591 s ± 6.525 s
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- v4 (`deterministic`) : 3.900 s ± 0.121 s
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- v5 (`print`) : 3.120 s ± 0.062 s
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- v6 (`dead code`): 2.844 s ± 0.059 s
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- v7 (`bytes`) : 1.837 s ± 0.067 s
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## Encore plus d'expériences
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- pypy: 3.8s
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- python: 1.8s
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- cython (hashlib) 1.3s
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- cython (crypto) 0.8s
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- c: 0.3s
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