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[CoverageFormat1] Speed up intersects() 

Speeds up SourceHanSerif/10000 benchmark (not in test suite) by
32%!
This commit is contained in:
Behdad Esfahbod 2022-12-03 09:57:29 -07:00
parent a2d33779e1
commit 4d19c724c0
1 changed files with 8 additions and 3 deletions
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11
src/OT/Layout/Common/CoverageFormat1.hh
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@ -77,9 +77,14 @@ struct CoverageFormat1_3
bool intersects (const hb_set_t *glyphs) const
{
/* TODO Speed up, using hb_set_next() and bsearch()?
* Experience with other tables suggest that it would
* not speed up though. */
if (glyphArray.len > glyphs->get_population () * hb_bit_storage ((unsigned) glyphArray.len) / 2)
{
for (hb_codepoint_t g = HB_SET_VALUE_INVALID; glyphs->next (&g);)
if (get_coverage (g) != NOT_COVERED)
return true;
return false;
}
for (const auto& g : glyphArray.as_array ())
if (glyphs->has (g))
return true;