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