go /
image /
8874bef159af77ab9e746fc3c80b2219b3652045 vector: change ϕ from 10 to 9.
This slight loss in quality allows us to use int32 math exclusively
throughout raster_fixed.go, instead of occasionally dropping into int64
math. The change in ϕ doesn't affect the benchmarks noticably, but
staying in int32 does. The net effect:
name old time/op new time/op delta
GlyphAlpha16Over-8 3.36µs ± 0% 2.99µs ± 0% -10.89% (p=0.000 n=10+9)
GlyphAlpha16Src-8 3.26µs ± 0% 2.89µs ± 1% -11.34% (p=0.000 n=9+10)
GlyphAlpha32Over-8 5.20µs ± 0% 4.53µs ± 0% -12.76% (p=0.000 n=8+10)
GlyphAlpha32Src-8 4.81µs ± 1% 4.14µs ± 0% -13.91% (p=0.000 n=9+9)
GlyphAlpha64Over-8 10.2µs ± 0% 9.0µs ± 1% -11.99% (p=0.000 n=9+10)
GlyphAlpha64Src-8 8.62µs ± 0% 7.42µs ± 1% -13.89% (p=0.000 n=9+10)
GlyphAlpha128Over-8 24.1µs ± 0% 21.8µs ± 0% -9.32% (p=0.000 n=9+9)
GlyphAlpha128Src-8 17.9µs ± 0% 15.6µs ± 0% -12.68% (p=0.000 n=9+10)
GlyphAlpha256Over-8 70.1µs ± 0% 66.3µs ± 1% -5.44% (p=0.000 n=10+10)
GlyphAlpha256Src-8 45.2µs ± 1% 41.2µs ± 1% -8.92% (p=0.000 n=10+10)
GlyphRGBA16Over-8 5.12µs ± 0% 4.75µs ± 0% -7.15% (p=0.000 n=10+9)
GlyphRGBA16Src-8 4.57µs ± 1% 4.20µs ± 0% -8.18% (p=0.000 n=9+8)
GlyphRGBA32Over-8 12.1µs ± 0% 11.4µs ± 0% -5.50% (p=0.000 n=10+9)
GlyphRGBA32Src-8 10.0µs ± 0% 9.3µs ± 1% -6.80% (p=0.000 n=10+9)
GlyphRGBA64Over-8 37.2µs ± 0% 36.0µs ± 0% -3.17% (p=0.000 n=9+8)
GlyphRGBA64Src-8 29.0µs ± 1% 27.9µs ± 1% -4.05% (p=0.000 n=9+10)
GlyphRGBA128Over-8 134µs ± 1% 131µs ± 0% -1.85% (p=0.000 n=9+9)
GlyphRGBA128Src-8 100µs ± 1% 98µs ± 0% -2.27% (p=0.000 n=10+9)
GlyphRGBA256Over-8 506µs ± 0% 503µs ± 0% -0.56% (p=0.000 n=10+8)
GlyphRGBA256Src-8 373µs ± 0% 370µs ± 0% -1.01% (p=0.000 n=10+9)
Change-Id: Ie02afac6fd6fa95f090bf3fe0a5c744799ea9dc5
Reviewed-on: https://go-review.googlesource.com/31532
Reviewed-by: David Crawshaw <crawshaw@golang.org>
6 files changed
