mozjpeg: default to fastest compression profile #311
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libultrahdr wraps but does not expose these
kleisauke
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Dec 19, 2025
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Nice catch! I suppose this would also be useful when encoding a TIFF with JPEG compression (AFAIK, it currently triggers this warning).
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In the prebuilt binaries, libultrahdr wraps mozjpeg (via the libjpeg API) but does not expose any of the underlying settings, so gainmap generation is ~3x slower than expected due to use of the default compression profile.
This change matches the default behaviour of libvips.
/cc @kleisauke as you might be interested in this for wasm-vips etc.