这个 Python cProfile 输出是什么意思？
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 65.417 65.417 <string>:1(<module>)
1 43.675 43.675 65.417 65.417 primenumber_o.py:3(main)
1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Profiler' objects}
99999 21.742 0.000 21.742 0.000 {range}
2 0.000 0.000 0.000 0.000 {time.time}
具体来说，第三行。我阅读了 cProfile，但没有解释该行的含义。它也没有提供任何我可以在谷歌上搜索的关键字，所以我很困惑。
我正在分析的 Python 脚本查找素数。
我看到第 5 行的循环花费了 21 秒。我不明白的是另外 43 秒在做什么。
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 65.417 65.417 <string>:1(<module>)
1 43.675 43.675 65.417 65.417 primenumber_o.py:3(main)
1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Profiler' objects}
99999 21.742 0.000 21.742 0.000 {range}
2 0.000 0.000 0.000 0.000 {time.time}
Specifically, the third line. I read up on cProfile, but nothing explained what that line means. It also doesn't provide any keywords I could search for on Google, so I'm stumped.
The Python script I'm profiling finds prime numbers.
I see that 21 seconds is spent in the loop, on line 5. What I don't understand is what the other 43 seconds is doing.
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第三行是文件中除
range()之外的所有代码。The third line is all of the code in the file that isn't
range().我没有使用过 cProfile，但在我看来，它根据函数名称将运行时分配到存储桶中。
for语句中的内置函数range()使用了 21 秒。另外 43 秒不在单独的命名函数中，因此它被认为属于 main 的名称，如下所示：如果将循环体放入函数中，则 43秒（或大部分）将显示在那里。如果将主体分成多个功能，您将获得更细粒度的分析。
I haven't used cProfile, but it looks to me that it assigns runtime into buckets based on function names. 21 seconds is being used by the built-in function
range()in theforstatement. The other 43 seconds isn't in a separate, named function, so the name it is considered to fall within ismain, as in:If you put the body of the loop into a function, the 43 seconds (or most of it) will show up there. If you split up the body into multiple functions, you'll get more fine-grained profiling.