[Python-Dev] Have a big machine and spare time? Here's a possible Python bug. (original) (raw)
Tim Peters tim.peters at gmail.com
Thu May 23 13:13:11 EDT 2019
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[Inada Naoki <songofacandy at gmail.com>]
... 2. This loop is cleary hot: https://github.com/python/cpython/blob/51aa35e9e17eef60d04add9619fe2a7eb938358c/Objects/obmalloc.c#L1816-L1819
Which is 3 lines of code plus a closing brace. The OP didn't build their own Python, and the source from which it was compiled wasn't available to them. But they did say that when they got into gdb and single-stepped, it was looping through the same three lines of code, in obmalloc.c, over & over. Which is 100% consistent with the loop you identified as being "the hot spot".
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