Cache the "raw" standard font data in the worker-thread (PR 12726 follow-up) #13515
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/botio test |
From: Bot.io (Linux m4)ReceivedCommand cmd_test from @Snuffleupagus received. Current queue size: 1 Live output at: http://54.67.70.0:8877/4e1c914f6aee4af/output.txt |
From: Bot.io (Windows)ReceivedCommand cmd_test from @Snuffleupagus received. Current queue size: 1 Live output at: http://3.101.106.178:8877/9f44160cf612609/output.txt |
From: Bot.io (Linux m4)FailedFull output at http://54.67.70.0:8877/4e1c914f6aee4af/output.txt Total script time: 26.13 mins
Image differences available at: http://54.67.70.0:8877/4e1c914f6aee4af/reftest-analyzer.html#web=eq.log |
From: Bot.io (Windows)FailedFull output at http://3.101.106.178:8877/9f44160cf612609/output.txt Total script time: 29.22 mins
Image differences available at: http://3.101.106.178:8877/9f44160cf612609/reftest-analyzer.html#web=eq.log |
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…low-up) *This implementation is basically a copy of the pre-existing `builtInCMapCache` implementation.* For some, badly generated, PDF documents it's possible that we'll end up having to fetch the *same* standard font data over and over (which is obviously inefficient). While not common, it's certainly possible that a PDF document uses *custom* font names where the actual font then references one of the standard fonts; see e.g. issue 11399 for one such example. Note that I did suggest adding worker-thread caching of standard font data in PR 12726, however it wasn't deemed necessary at the time. Now that we have a real-world example that benefit from caching, I think that we should simply implement this now.
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timvandermeij
approved these changes
Jun 9, 2021
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Looks good to me; thank you for doing this! |
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This implementation is basically a copy of the pre-existing
builtInCMapCacheimplementation.For some, badly generated, PDF documents it's possible that we'll end up having to fetch the same standard font data over and over (which is obviously inefficient).
While not common, it's certainly possible that a PDF document uses custom font names where the actual font then references one of the standard fonts; see e.g. issue #11399 for one such example. Edit: Loading all pages of that document currently causes the
FoxitSymbol.pfbfile to be loaded thirteen times.Note that I did suggest adding worker-thread caching of standard font data in PR #12726, however it wasn't deemed necessary at the time. Now that we have a real-world example that benefit from caching, I think that we should simply implement this now.