classification
Title: improve performance of binascii.a2b_base64()
Type: performance Stage: patch review
Components: Extension Modules Versions: Python 3.8
process
Status: open Resolution:
Dependencies: Superseder:
Assigned To: Nosy List: sir-sigurd
Priority: normal Keywords: patch

Created on 2018-09-20 11:45 by sir-sigurd, last changed 2018-09-20 11:45 by sir-sigurd.

Pull Requests
URL Status Linked Edit
PR 9444 open sir-sigurd, 2018-09-20 11:45
Messages (1)
msg325860 - (view) Author: Sergey Fedoseev (sir-sigurd) * Date: 2018-09-20 11:45
I reworked implementation of binascii.a2b_base64() and there is significant speedup:

$ python -m perf timeit --compare-to ~/tmp/cpython-master-venv/bin/python -s "from binascii import b2a_base64, a2b_base64; s = b2a_base64(1000 * b'b')" "a2b_base64(s)"
/home/sergey/tmp/cpython-master-venv/bin/python: ..................... 3.43 us +- 0.01 us
/home/sergey/tmp/cpython-dev-venv/bin/python: ..................... 1.52 us +- 0.01 us
Mean +- std dev: [/home/sergey/tmp/cpython-master-venv/bin/python] 3.43 us +- 0.01 us -> [/home/sergey/tmp/cpython-dev-venv/bin/python] 1.52 us +- 0.01 us: 2.26x faster (-56%)

$ python -m perf timeit --compare-to ~/tmp/cpython-master-venv/bin/python -s "from binascii import b2a_base64, a2b_base64; s = b2a_base64(1 * b'b')" "a2b_base64(s)"
/home/sergey/tmp/cpython-master-venv/bin/python: ..................... 76.0 ns +- 0.2 ns
/home/sergey/tmp/cpython-dev-venv/bin/python: ..................... 69.2 ns +- 0.1 ns
Mean +- std dev: [/home/sergey/tmp/cpython-master-venv/bin/python] 76.0 ns +- 0.2 ns -> [/home/sergey/tmp/cpython-dev-venv/bin/python] 69.2 ns +- 0.1 ns: 1.10x faster (-9%)
History
Date User Action Args
2018-09-20 11:45:58sir-sigurdsetkeywords: + patch
stage: patch review
pull_requests: + pull_request8859
2018-09-20 11:45:10sir-sigurdcreate