Deluan Quintão fd4b3256e4

perf(artwork): compute the blurhash DCT separably (#5989) ...

The cosine basis factors into cosX[i][x] * cosY[j][y], so the pixel loop
does not need to visit every (i,j) pair. Each row now collapses to xComp
dot products, folded over yComp once per row: w*h*xComp + h*xComp*yComp
multiply-accumulates instead of w*h*xComp*yComp.

Encoding is ~60% faster at every input size, and ~80% faster at the 128px
size the artwork pipeline actually feeds it (263us -> 53us). Hashes are
byte-identical, so the existing golden-value specs cover the rewrite.

2026-08-19 16:20:38 -04:00

..

blurhash_suite_test.go

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blurhash_test.go

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blurhash.go

perf(artwork): compute the blurhash DCT separably (#5989)

2026-08-19 16:20:38 -04:00