My bad, I said font metrics. I meant full text shaping. And native, not JS. Or how 'bout: how hard would it be make HarfBuzz thread-safe?
@littlecalculist I thought HB was already thread safe? I was under that impression.
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@pcwalton Or maybe thread safe but unparallelizable due to too much locking? Brian's design doc suggests it can't be parallelized. -
@littlecalculist@pcwalton HB uses callbacks and local buffers. It is CoreText and old freetype that has global locking. And maybe Cairo - 4 more replies
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