Author vstinner
Recipients brett.cannon, pitrou, vstinner
Date 2016-01-13.16:12:34
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Message-id <1452701554.57.0.0524257395403.issue26058@psf.upfronthosting.co.za>
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Content
guard_benchmark.patch: patch adding a _testcapi.guard_benchmark(), a microbenchmark on dictionary guard. The benchmark measures the cost of checking if a dictionary key was modified.

Run the benchmark with attached guard_benchmark.py. Result on my PC:

* PyObject_GetItem(): 10.2 ns
* PyDict_GetItem(): 9.1 ns
* guard->check(): 2.9 ns

python3 -m platform:
Linux-4.2.8-300.fc23.x86_64-x86_64-with-fedora-23-Twenty_Three

You have to modify manually _testcapi.c to choose between the 3 implementations.

guard_benchmark.patch requires the issue #26098 patch and the fat module which implements fat.GuardDict. The fat module can be found at:
https://github.com/haypo/fat
History
Date User Action Args
2016-01-13 16:12:34vstinnersetrecipients: + vstinner, brett.cannon, pitrou
2016-01-13 16:12:34vstinnersetmessageid: <1452701554.57.0.0524257395403.issue26058@psf.upfronthosting.co.za>
2016-01-13 16:12:34vstinnerlinkissue26058 messages
2016-01-13 16:12:34vstinnercreate