Behdad Esfahbod 40ca30a82b [subset] Improve GSUB closure memoize algorithm
Instead of memoizing the tuple of <lookup-idx,current-glyphs>, use a mapping of
lookup-idx->current-glyphs instead. Saves some work. Speeds up 5%ish on
NotoNastaliqUrdu-Regular.
2018-06-11 23:46:42 -04:00
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