github/pyenv
1
0
Fork 0
mirror of https://github.com/pyenv/pyenv.git synced 2024-11-07 20:31:01 -05:00
Code Issues Projects Releases Packages Wiki Activity

Merge pull request #2579 from hauntsaninja/faster-cpython

Browse source 
Mention how to build for maximum performance
This commit is contained in:
Anton Petrov 2023-01-03 09:04:44 +03:00 committed by GitHub
commit 894bcd8717
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 18 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
README.md
View file

@ -396,6 +396,9 @@ You can pass options to Python's `configure` and compiler flags to customize the
see [_Special environment variables_ in Python-Build's README](plugins/python-build/README.md#special-environment-variables)
for details.
**NOTE:** If you'd like a faster interpreter at the cost of longer build times,
see [_Building for maximum performance_ in Python-Build's README](plugins/python-build/README.md#building-for-maximum-performance).
**NOTE:** If you want to use proxy for download, please set the `http_proxy` and `https_proxy`
environment variables.

15
plugins/python-build/README.md
View file

@ -164,6 +164,21 @@ the version(s) installed with `--enable-shared`.
$ env PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install 2.7.9
```
### Building for maximum performance
Building CPython with `--enable-optimizations` will result in a faster
interpreter at the cost of significantly longer build times. Most notably, this
enables PGO (profile guided optimization). While your mileage may vary, it is
common for performance improvement from this to be in the ballpark of 30%.
```sh
env PYTHON_CONFIGURE_OPTS='--enable-optimizations --with-lto' PYTHON_CFLAGS='-march=native -mtune=native' pyenv install 3.6.0
```
You can also customize the task used for profile guided optimization by setting
the `PROFILE_TASK` environment variable, for instance, `PROFILE_TASK='-m
test.regrtest --pgo -j0'` will run much faster than the default task.
### Checksum verification
If you have the `shasum`, `openssl`, or `sha256sum` tool installed, python-build will