Title: gh-118761: Improve import time by lazy import of `traceback` by donbarbos · Pull Request #129811 · python/cpython · GitHub
Open Graph Title: gh-118761: Improve import time by lazy import of `traceback` by donbarbos · Pull Request #129811 · python/cpython
X Title: gh-118761: Improve import time by lazy import of `traceback` by donbarbos · Pull Request #129811 · python/cpython
Description: TODO: Improve import time modules by lazy import traceback Remove unused import fcntl CPython configure flags: ./configure --enable-optimizations --with-lto --enable-loadable-sqlite-extensions Hyperfine benchmark for import traceback: $ hyperfine --warmup 11 "./python -c 'import traceback'" Benchmark 1: ./python -c 'import traceback' Time (mean ± σ): 17.0 ms ± 0.5 ms [User: 14.2 ms, System: 2.7 ms] Range (min … max): 16.5 ms … 22.7 ms 167 runs Hyperfine benchmarks for updated modules: import _pyrepl experiments (no diff) ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 --runs 3000 "./python -c 'import _pyrepl'" Benchmark 1: ./python -c 'import _pyrepl' Time (mean ± σ): 9.2 ms ± 0.4 ms [User: 7.3 ms, System: 1.8 ms] Range (min … max): 8.6 ms … 14.7 ms 3000 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 --runs 3000 "./python -c 'import _pyrepl'" Benchmark 1: ./python -c 'import _pyrepl' Time (mean ± σ): 9.3 ms ± 0.3 ms [User: 7.4 ms, System: 1.8 ms] Range (min … max): 8.7 ms … 14.7 ms 3000 runs import code experiments ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 --runs 3000 "./python -c 'import code'" Benchmark 1: ./python -c 'import code' Time (mean ± σ): 10.0 ms ± 0.5 ms [User: 8.2 ms, System: 1.8 ms] Range (min … max): 9.3 ms … 15.8 ms 3000 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 --runs 3000 "./python -c 'import code'" Benchmark 1: ./python -c 'import code' Time (mean ± σ): 17.8 ms ± 0.8 ms [User: 14.9 ms, System: 2.9 ms] Range (min … max): 17.0 ms … 28.7 ms 3000 runs import doctest experiments (no diff) ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 "./python -c 'import doctest'" Benchmark 1: ./python -c 'import doctest' Time (mean ± σ): 34.8 ms ± 0.3 ms [User: 30.2 ms, System: 4.6 ms] Range (min … max): 34.2 ms … 35.7 ms 84 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 "./python -c 'import doctest'" Benchmark 1: ./python -c 'import doctest' Time (mean ± σ): 35.6 ms ± 0.5 ms [User: 30.8 ms, System: 4.8 ms] Range (min … max): 34.9 ms … 37.9 ms 81 runs import logging experiments (no diff) ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 --runs 2000 "./python -c 'import logging'" Benchmark 1: ./python -c 'import logging' Time (mean ± σ): 20.9 ms ± 0.7 ms [User: 17.7 ms, System: 3.1 ms] Range (min … max): 20.1 ms … 32.7 ms 2000 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 --runs 2000 "./python -c 'import logging'" Benchmark 1: ./python -c 'import logging' Time (mean ± σ): 20.7 ms ± 0.5 ms [User: 17.7 ms, System: 3.0 ms] Range (min … max): 20.0 ms … 30.8 ms 2000 runs import pdb experiments (no diff) ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 --runs 2000 "./python -c 'import pdb'" Benchmark 1: ./python -c 'import pdb' Time (mean ± σ): 29.3 ms ± 0.9 ms [User: 25.0 ms, System: 4.2 ms] Range (min … max): 28.2 ms … 37.9 ms 2000 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 --runs 2000 "./python -c 'import pdb'" Benchmark 1: ./python -c 'import pdb' Time (mean ± σ): 30.1 ms ± 1.3 ms [User: 25.9 ms, System: 4.2 ms] Range (min … max): 28.8 ms … 44.2 ms 2000 runs import py_compile experiments ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 --runs 2000 "./python -c 'import py_compile'" Benchmark 1: ./python -c 'import py_compile' Time (mean ± σ): 11.7 ms ± 0.5 ms [User: 9.6 ms, System: 2.0 ms] Range (min … max): 10.9 ms … 19.5 ms 2000 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 "./python -c 'import py_compile'" Benchmark 1: ./python -c 'import py_compile' Time (mean ± σ): 18.2 ms ± 0.5 ms [User: 15.4 ms, System: 2.7 ms] Range (min … max): 17.4 ms … 21.0 ms 159 runs import pydoc experiments ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 "./python -c 'import pydoc'" Benchmark 1: ./python -c 'import pydoc' Time (mean ± σ): 32.6 ms ± 0.4 ms [User: 28.4 ms, System: 4.2 ms] Range (min … max): 31.8 ms … 34.3 ms 87 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 "./python -c 'import pydoc'" Benchmark 1: ./python -c 'import pydoc' Time (mean ± σ): 34.3 ms ± 0.3 ms [User: 30.2 ms, System: 4.1 ms] Range (min … max): 33.5 ms … 35.2 ms 84 runs import unittest experiments ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 "./python -c 'import unittest'" Benchmark 1: ./python -c 'import unittest' Time (mean ± σ): 21.9 ms ± 0.3 ms [User: 18.4 ms, System: 3.4 ms] Range (min … max): 21.3 ms … 22.8 ms 133 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 "./python -c 'import unittest'" Benchmark 1: ./python -c 'import unittest' Time (mean ± σ): 23.3 ms ± 0.3 ms [User: 19.5 ms, System: 3.7 ms] Range (min … max): 22.6 ms … 24.3 ms 123 runs import xmlrpc experiments (no diff) ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 --runs 3000 "./python -c 'import xmlrpc'" Benchmark 1: ./python -c 'import xmlrpc' Time (mean ± σ): 9.1 ms ± 0.4 ms [User: 7.3 ms, System: 1.8 ms] Range (min … max): 8.7 ms … 14.6 ms 3000 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 --runs 3000 "./python -c 'import xmlrpc'" Benchmark 1: ./python -c 'import xmlrpc' Time (mean ± σ): 9.1 ms ± 0.4 ms [User: 7.4 ms, System: 1.7 ms] Range (min … max): 8.6 ms … 19.6 ms 3000 runs ➜ cpython git:(lazy-imports-traceback) ✗ hyperfine --warmup 11 "./python -c 'import xmlrpc'" Benchmark 1: ./python -c 'import xmlrpc' Time (mean ± σ): 8.8 ms ± 0.6 ms [User: 7.3 ms, System: 1.5 ms] Range (min … max): 8.3 ms … 14.5 ms 277 runs ➜ cpython git:(3d3a4beefe) ✗ hyperfine --warmup 11 "./python -c 'import xmlrpc'" Benchmark 1: ./python -c 'import xmlrpc' Time (mean ± σ): 8.7 ms ± 0.2 ms [User: 7.4 ms, System: 1.4 ms] Range (min … max): 8.2 ms … 9.8 ms 303 runs Issue: gh-118761
Open Graph Description: TODO: Improve import time modules by lazy import traceback Remove unused import fcntl CPython configure flags: ./configure --enable-optimizations --with-lto --enable-loadable-sqlite-extensions ...
X Description: TODO: Improve import time modules by lazy import traceback Remove unused import fcntl CPython configure flags: ./configure --enable-optimizations --with-lto --enable-loadable-sqlite-extensions ...
Opengraph URL: https://github.com/python/cpython/pull/129811
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