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# Conflicts: # README.md
… tile grid. Stream s becomes tile (tx,ty) = (s%gx, s/gx) with even-split bounds from one shared helper; gx is 8/4/2/1 by width so tiles stay >= 4 blocks wide, gy = 64/gx. No header byte or API change; the even split also keeps the trailing block rows of images whose size is not a multiple of the tile. New average compression ratio : bc1 1.4676:1 -> 1.4905:1, bc3 2.8199:1 -> 2.8787:1. Also documents the reverted BC4/BC5 cross-block index context (failed_experiments exp 23: +0.8% bc4 / -0.2% bc5 ratio but -35..-44% decode, over the speed gate).
…image suite) alongside the bc1/bc5 ones; it also serves as the measurement harness for bc4/bc5 decode experiments
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