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Add instructions on using libyaml

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For a 10x speed increase!
This commit is contained in:
Willem de Groot
2015-08-27 11:19:31 +02:00
parent 083b1ec686
commit 4450cb992f
1 changed files with 18 additions and 0 deletions
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README.rst
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@@ -573,6 +573,24 @@ If you set the loglevel to DEBUG, you will also get information about
which matchers didn't match. This can help you with debugging custom which matchers didn't match. This can help you with debugging custom
matchers. matchers.
Speed
-----
VCR.py runs about 10x faster when pyyaml can use the libyaml extensions. However, just installing ``libyaml`` (Mac) or `libyaml-dev`` (Linux) is not enough, as pyyaml needs to be rebuild with the proper flag. Note that this flag is cached by pip, so clear the cache first.
Are you using libyaml already? This should work:
::
python -c 'from yaml import CLoader'
If not:
::
pip uninstall pyyaml
pip --no-cache-dir install pyyaml
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