Hi,
I changed some old shaping code to provide pre/post context as
documented in [1]. I simply pass the full text and segment info for the
relevant part of the text into an hb_buffer_t, instead of passing only
the run to be shaped into the buffer. This works, but there is a major
slowdown! I didn't get any precise numbers and didn't do any profiling
yet, but shaping is 4-5x slower.
I can't imagine that's supposed to slow down the shaper so much when
processing typical runs. Any idea?
Grigori
[1]
http://cgit.freedesktop.org/harfbuzz/commit/?id=05207a79e0ae1769c5feaebe3fd99bdf9cfcf834
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