Files
lightcraft/crates
dev-null-undefinedandClaude Opus 5.5 1e55d36e36 Perf: DNG Deflate tiles at level 1, 4.8–7× faster writes for 3–12 % more bytes
Deflate-compressed DNG tiles are written at zlib level 1 instead of 6. Measured on
Sony A7R VI files (67 MP), 4 threads, best of 3:
- Photo Merge DNG (half floats, 3 channels): 3.88 → 0.55 s, 265.7 → 274.8 MB (+3.4 %)
- raw export with Deflate (16-bit CFA): 0.89 → 0.18 s, 96.7 → 103.0 MB (+6.5 %)
- rendered DNG: 4.60 → 0.69 s, 239.0 → 267.1 MB (+11.8 %)
Lossless either way; both written files decode back bit-exactly. Lossless-JPEG
DNGs (the default for convert/import) are unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-14 15:58:37 +02:00
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