[Python-Dev] Opcode cache in ceval loop (original) (raw)

Yury Selivanov yselivanov.ml at gmail.com
Tue Feb 2 12:45:55 EST 2016

On 2016-02-02 12:41 PM, Serhiy Storchaka wrote:

On 01.02.16 21:10, Yury Selivanov wrote:

To measure the max/average memory impact, I tuned my code to optimize every code object on first run. Then I ran the entire Python test suite. Python test suite + standard library both contain around 72395 code objects, which required 20Mb of memory for caches. The test process consumed around 400Mb of memory. Thus, the absolute worst case scenario, the overhead is about 5%. Test process consumes such much memory because few tests creates huge objects. If exclude these tests (note that tests that requires more than 1Gb are already excluded by default) and tests that creates a number of threads (threads consume much memory too), the rest of tests needs less than 100Mb of memory. Absolute required minimum is about 25Mb. Thus, the absolute worst case scenario, the overhead is about 100%. Can you give me the exact configuration of tests (command line to run) that would only consume 25mb?

Yury

More information about the Python-Dev mailing list