Victor Stinner blog 3

This is the second part of my contributions to CPython during 2017 Q2 (april, may, june):

• Mentoring
• Reference and memory leaks
• Contributions
• Enhancements
• Bugfixes
• Stars of the CPython GitHub project

Previous report: My contributions to CPython during 2017 Q2 (part 1).

Next report: My contributions to CPython during 2017 Q2 …

This is the first part of my contributions to CPython during 2017 Q2 (april, may, june):

• Statistics
• Buidbots and test.bisect
• Python 3.6.0 regression
• struct.Struct.format type
• Optimization: one less syscall per open() call
• make regen-all

Previous report: My contributions to CPython during 2017 Q1.

Next reports …

I spent the last 6 months on working on buildbots: reduce the failure rate, send email notitication on failure, fix random bugs, detect more bugs using warnings, backport fixes to older branches, etc. I decided to fix all buildbots issues: fix all warnings and all unstable tests!

The good news …

This article tells the story of the new CPython test.bisect tool to identify failing tests in the CPython test suite.

My contributions to CPython during 2017 Q1 (january, februrary, march):

• Statistics
• Optimization
• Tricky bug
• FASTCALL optimizations
• Stack consumption
• Contributions
• os.urandom() and getrandom()
• Migration to GitHub
• Enhancements
• Security
• regrtest
• Bugfixes

Previous report: My contributions to CPython during 2016 Q4. Next report: My contributions to CPython during 2017 Q2 (part 1 …

In feburary 2017, CPython from Bitbucket with Mercurial moved to GitHub with Git: read [Python-Dev] CPython is now on GitHub by Brett Cannon.

In 2016, I worked on speed.python.org to automate running benchmarks and make benchmarks more stable. At the end, I had a single command to:

• tune …

Here is the raw list of the 46 CPython issues I opended between 2016-04-21 and 2017-02-10 to implement my FASTCALL optimization. Most issues created in 2016 are already part of Python 3.6.0, some are already merged into the future Python 3.7, the few remaining issues are still …

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 a …

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. Next report: My contributions to CPython during 2017 Q1.

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