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Title: Use test cache for test result images too. by anntzer · Pull Request #15932 · matplotlib/matplotlib · GitHub

Open Graph Title: Use test cache for test result images too. by anntzer · Pull Request #15932 · matplotlib/matplotlib

X Title: Use test cache for test result images too. by anntzer · Pull Request #15932 · matplotlib/matplotlib

Description: For image comparison tests in svg/pdf/ps formats, the result images are converted to png for comparison. Previously the conversion results were cached for the baseline images, but not for the test-generated images (because of non-deterministic svg/pdf/etc. results, due to hash-salting, dict ordering, etc.). Now that the test-generated images are generally deterministic, we can enable the cache for baseline images as well. This speeds up pytest -k '[svg]' by ~30% (81s initially -> 55s on a seeded cache) and pytest -k '[pdf]' by ~10% (62s -> 55s) (there are too few (e)ps image comparison tests to see an effect). Also add logging regarding the cache which may help troubleshooting determinacy problems. This is a much simpler version of PR#7764, which added more sophisticated reporting of cache hits and misses, as well as cache invalidation (I think the cache can reasonably be cleaned manually, at least for now). A simple cache eviction mechanism prevents the cache from growing without bounds, limiting it to 2x the size of the baseline_images directory. This is a much simpler version of PR7764, which added more sophisticated reporting of cache hits and misses and cache eviction. Supersedes (mostly) #7764 (@jkseppan). (Note that the gain in speed is less than reported than in #7764 (comment), because I have also optimized the svg and gs converters in the meantime by running a single process and interacting with it over stdin/stdout, rather that launching a new instance of inkscape/ghostscript for each image.) PR Summary PR Checklist Has Pytest style unit tests Code is Flake 8 compliant New features are documented, with examples if plot related Documentation is sphinx and numpydoc compliant Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there) Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way

Open Graph Description: For image comparison tests in svg/pdf/ps formats, the result images are converted to png for comparison. Previously the conversion results were cached for the baseline images, but not for the test...

X Description: For image comparison tests in svg/pdf/ps formats, the result images are converted to png for comparison. Previously the conversion results were cached for the baseline images, but not for the test...

Opengraph URL: https://github.com/matplotlib/matplotlib/pull/15932

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