[Python-Dev] Updated PEP 454 (tracemalloc): no more metrics! (original) (raw)

Kristján Valur Jónsson kristjan at ccpgames.com
Wed Oct 30 13:37:48 CET 2013

-----Original Message----- From: Victor Stinner [mailto:victor.stinner at gmail.com] Sent: 29. október 2013 21:30 To: Kristján Valur Jónsson Cc: python-dev Subject: Re: [Python-Dev] Updated PEP 454 (tracemalloc): no more metrics! tracemalloc maintains a dictionary of all allocated memory blocks, which is slow and eats a lot of memory. You don't need tracemalloc to log calls to malloc/realloc/free. You can write your own hook using the PEP 445 (malloc API). A code just writing to stderr should not be longer than 100 linues (tracemalloc is closer to 2500 lines).

The point of a PEP is getting something into standard python. The command line flag is also part of this. Piggybacking a lightweight client/server data-gathering version of this on top of the PEP could be beneficial in that respect.

Unless I am mistaken, the Pep 445 hooks must be setup before calling Py_Initialize() and so using them is not trivial.

Anyway, just a suggestion, for the record.

K

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