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fea-rs should prune unreachable lookups #1047

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cmyr opened this issue Oct 16, 2024 · 1 comment
Open

fea-rs should prune unreachable lookups #1047

cmyr opened this issue Oct 16, 2024 · 1 comment
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@cmyr
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cmyr commented Oct 16, 2024

There's definitely something funny going on here; our GSUB is about 190kb, versus 67.5kb for fontmake.

It might be that fontc just isn't doing 'dead lookup' analysis at all? Looking at the FEA for that font it does appear that there are a bunch of lookups that get declared but then are never added to a feature...

Originally posted by @cmyr in #1046
@cmyr cmyr self-assigned this Oct 16, 2024
@khaledhosny
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I don’t think feaLib does such pruning either.

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@khaledhosny @cmyr