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We tried this before with a dict and for all interned strings. That ran into problems due to interpreter isolation. However, exclusively using a per-interpreter cache caused some inconsistency that can eliminate the benefit of interning. Here we circle back to using a global cache, but only for statically allocated strings. We also use a more-basic _Py_hashtable_t for that global cache instead of a dict.
Ideally we would only have the global cache, but the optional isolation of each interpreter's allocator means that a non-static string object must not outlive its interpreter. Thus we would have to store a copy of each such interned string in the global cache, tied to the main interpreter.
(cherry-picked from commit
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| .. | ||
| build | ||
| buildbot | ||
| c-analyzer | ||
| cases_generator | ||
| ccbench | ||
| clinic | ||
| freeze | ||
| gdb | ||
| i18n | ||
| importbench | ||
| iobench | ||
| msi | ||
| nuget | ||
| patchcheck | ||
| peg_generator | ||
| scripts | ||
| ssl | ||
| stringbench | ||
| tz | ||
| unicode | ||
| unittestgui | ||
| wasm | ||
| README | ||
| requirements-dev.txt | ||
| requirements-hypothesis.txt | ||
This directory contains a number of Python programs that are useful
while building or extending Python.
build Automatically generated directory by the build system
contain build artifacts and intermediate files.
buildbot Batchfiles for running on Windows buildbot workers.
c-analyzer Tools to check no new global variables have been added.
cases_generator Tooling to generate interpreters.
ccbench A Python threads-based concurrency benchmark. (*)
clinic A preprocessor for CPython C files in order to automate
the boilerplate involved with writing argument parsing
code for "builtins".
freeze Create a stand-alone executable from a Python program.
gdb Python code to be run inside gdb, to make it easier to
debug Python itself (by David Malcolm).
i18n Tools for internationalization. pygettext.py
parses Python source code and generates .pot files,
and msgfmt.py generates a binary message catalog
from a catalog in text format.
importbench A set of micro-benchmarks for various import scenarios.
iobench Benchmark for the new Python I/O system. (*)
msi Support for packaging Python as an MSI package on Windows.
nuget Files for the NuGet package manager for .NET.
patchcheck Tools for checking and applying patches to the Python source code
and verifying the integrity of patch files.
peg_generator PEG-based parser generator (pegen) used for new parser.
scripts A number of useful single-file programs, e.g. tabnanny.py
by Tim Peters, which checks for inconsistent mixing of
tabs and spaces, and 2to3, which converts Python 2 code
to Python 3 code.
ssl Scripts to generate ssl_data.h from OpenSSL sources, and run
tests against multiple installations of OpenSSL and LibreSSL.
stringbench A suite of micro-benchmarks for various operations on
strings (both 8-bit and unicode). (*)
tz A script to dump timezone from /usr/share/zoneinfo.
unicode Tools for generating unicodedata and codecs from unicode.org
and other mapping files (by Fredrik Lundh, Marc-Andre Lemburg
and Martin von Loewis).
unittestgui A Tkinter based GUI test runner for unittest, with test
discovery.
wasm Config and helpers to facilitate cross compilation of CPython
to WebAssembly (WASM).
(*) A generic benchmark suite is maintained separately at https://github.com/python/performance
Note: The pynche color editor has moved to https://gitlab.com/warsaw/pynche