For my FASTCALL project (CPython optimization avoiding temporary tuples and dictionaries to pass arguments), I wrote many short microbenchmarks. I grouped them into a new Git repository: pymicrobench. Benchmark results are required by CPython developers to prove that an optimization is worth it. It's not uncommon that I abandon ...read more
In April 2016, I experimented a Python change to avoid temporary tuple to call functions. Builtin functions were between 20 and 50% faster!
Sadly, some benchmarks were randomy slower. It will take me four months to understand why!
Work on benchmarks
During four months, I worked on making ...
My contributions to CPython during 2016 Q4 (october, november, december):
hg log -r 'date("2016-10-01"):date("2016-12-31")' --no-merges -u Stinner
Statistics: 105 non-merge commits + 31 merge commits (total: 136 commits).
Previous report: My contributions to CPython during 2016 Q3.
Table of Contents:
- Python startup performance regression
- Code placement and ...
My contributions to CPython during 2016 Q3read more
I was invited at my first CPython sprint in September! Five days, September 5-9, at Instagram office in California, USA. The sprint was sponsored by Instagram, Microsoft, and the PSF.
First little game: Many happy faces, but Where is Victor?
IMHO it was the most productive CPython week ever :-) Having ...read more
getrandom() avoids file descriptors
Last years, I'm making sometimes enhancements in the Python code used to generate random numbers, the C implementation of os.urandom(). My main two changes were to use the new getentropy() and getrandom() functions when available on Linux, Solaris, OpenBSD, etc.
In 2013, os.urandom ...
My contributions to CPython during 2016 Q2 (april, may, june):
hg log -r 'date("2016-04-01"):date("2016-06-30")' --no-merges -u Stinner
Statistics: 52 non-merge commits + 22 merge commits (total: 74 commits).
Previous report: My contributions to CPython during 2016 Q1.
Start of my work on optimization
During 2016 Q2, I started ...
My contributions to CPython during 2016 Q1 (january, februrary, march):
hg log -r 'date("2016-01-01"):date("2016-03-31")' --no-merges -u Stinner
Statistics: 196 non-merge commits + 33 merge commits (total: 229 commits).
Previous report: My contributions to CPython during 2015 Q4.
Since this report is much longer than I expected, here ...
_PyBytesWriter APIread more
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