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kayrockscreenprintingandClaude Opus 5.5
6c4d4e9dc9
warp_mesh_gray (select.transformSelection with a warp mesh) cleared the
source and warped regions as one dense buffer over their union, so a mesh
that moves a selection far away allocated a buffer growing with the square
of the distance: about 37 GiB of floats for a 48 px selection moved
100000 px. b70fbd4 fixed the same thing in the homography path
(transform_cmds::warp_gray); this does the same here: clear the old region,
then write the warped one. Surface is tile-sparse, so a distant region
costs only its own tiles.
Moving a 48 px selection 8192 px, peak RSS of a test binary went from
346 MB to 3 MB (0.41 s to under 0.01 s).
The test warps 8- and 32-bit gray selections by ±100000 px and 300 px and
checks the result is the translated block with the old region cleared.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>