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Created on2019-02-01 20:19 byrhettinger, last changed2022-04-11 14:59 byadmin. This issue is nowclosed.
| Pull Requests | |||
|---|---|---|---|
| URL | Status | Linked | Edit |
| PR 11725 | merged | rhettinger,2019-02-01 20:24 | |
| PR 11725 | merged | rhettinger,2019-02-01 20:24 | |
| PR 11898 | merged | rhettinger,2019-02-16 20:32 | |
| PR 11905 | merged | scoder,2019-02-17 13:36 | |
| Messages (5) | |||
|---|---|---|---|
| msg334716 -(view) | Author: Raymond Hettinger (rhettinger)* | Date: 2019-02-01 20:19 | |
Adding a short script that I've found useful many times over the past decade. It has allowed my to quickly notice performance regressions and has helped identify places in need of optimization work. It is also useful for building a empirical mental model of the relative cost of various kinds of variable access -- this is useful in writing high performance code. | |||
| msg334719 -(view) | Author: Raymond Hettinger (rhettinger)* | Date: 2019-02-01 20:34 | |
Here's what the output looks like (here am comparing a fresh Py3.8 with Clang versus the same build with GCC-8):$ make distclean && ./configure && make$ pyTools/scripts/var_access_benchmark.pySpeed of different kinds of variable accesses: 4.2 μsread_local 4.7 μsread_nonlocal 13.7 μsread_global 18.5 μsread_builtin 18.2 μsread_classvar 26.8 μsread_instancevar 20.3 μsread_instancevar_slots 19.1 μsread_namedtuple 26.9 μsread_boundmethod 4.5 μswrite_local 4.8 μswrite_nonlocal 18.8 μswrite_global 89.9 μswrite_classvar 37.1 μswrite_instancevar 25.7 μswrite_instancevar_slots 0.3 μsloop_overhead$ make distclean && ./configure CC=gcc-8 && make$ pyTools/scripts/var_access_benchmark.pySpeed of different kinds of variable accesses: 4.0 μsread_local 4.2 μsread_nonlocal 11.4 μsread_global 16.3 μsread_builtin 16.4 μsread_classvar 24.8 μsread_instancevar 20.1 μsread_instancevar_slots 16.8 μsread_namedtuple 23.2 μsread_boundmethod 4.3 μswrite_local 4.5 μswrite_nonlocal 15.4 μswrite_global 89.4 μswrite_classvar 33.5 μswrite_instancevar 24.5 μswrite_instancevar_slots 0.3 μsloop_overhead | |||
| msg334788 -(view) | Author: Raymond Hettinger (rhettinger)* | Date: 2019-02-03 06:54 | |
New changesetf75d59e1a896115bd52f543a417c665d6edc331f by Raymond Hettinger in branch 'master':bpo-35884: Add variable access benchmarking script (GH-11725)https://github.com/python/cpython/commit/f75d59e1a896115bd52f543a417c665d6edc331f | |||
| msg335718 -(view) | Author: miss-islington (miss-islington) | Date: 2019-02-16 20:51 | |
New changeset43766f82ddec84fad7a321eeec2e1cbff6ee44d2 by Miss Islington (bot) (Raymond Hettinger) in branch 'master':bpo-35884: Add missing FIFO queue benchmark (GH-11898)https://github.com/python/cpython/commit/43766f82ddec84fad7a321eeec2e1cbff6ee44d2 | |||
| msg338790 -(view) | Author: Raymond Hettinger (rhettinger)* | Date: 2019-03-25 08:21 | |
New changeset68d228f174ceed151200e7e0b44ffc5edd4e0ea2 by Raymond Hettinger (Stefan Behnel) in branch 'master':bpo-35884: Add string-keys-only microbenchmark for dict access to var_access_benchmark.py (GH-11905)https://github.com/python/cpython/commit/68d228f174ceed151200e7e0b44ffc5edd4e0ea2 | |||
| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:10 | admin | set | github: 80065 |
| 2019-03-25 08:21:01 | rhettinger | set | messages: +msg338790 |
| 2019-02-17 13:36:32 | scoder | set | pull_requests: +pull_request11931 |
| 2019-02-16 20:51:05 | miss-islington | set | nosy: +miss-islington messages: +msg335718 |
| 2019-02-16 20:32:50 | rhettinger | set | pull_requests: +pull_request11925 |
| 2019-02-03 06:55:59 | rhettinger | set | keywords:patch,patch status: open -> closed resolution: fixed stage: patch review -> resolved |
| 2019-02-03 06:54:58 | rhettinger | set | messages: +msg334788 |
| 2019-02-01 20:34:35 | rhettinger | set | keywords:patch,patch messages: +msg334719 |
| 2019-02-01 20:24:54 | rhettinger | set | keywords: +patch stage: patch review pull_requests: +pull_request11607 |
| 2019-02-01 20:24:50 | rhettinger | set | keywords: +patch stage: (no value) pull_requests: +pull_request11606 |
| 2019-02-01 20:19:39 | rhettinger | create | |