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Mention use of --enable-optimizations and some other useful build options

Shantanu
2023-01-02 14:22:52 -08:00
parent 6a7e8d12a8
commit bb98a8ece4
1 changed files with 11 additions and 1 deletions
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Home.md

@@ -201,4 +201,14 @@ Some of 3rd party tool like [PyInstaller](https://github.com/pyinstaller/pyinsta
$ env PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install 3.5.0
```
Since pyenv (precisely, python-build) will build CPython with configuring RPATH, you don't have to set `LD_LIBRARY_PATH` to specify library path on GNU/Linux.
Since pyenv (precisely, python-build) will build CPython with configuring RPATH, you don't have to set `LD_LIBRARY_PATH` to specify library path on GNU/Linux.
### How to build CPython 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'`