Plate 55
mozjpeg vs libvips: 385ms vs 31ms Encode
mozjpeg cjpeg 3.3.1 (mozjpeg npm 8.0.0) vs libvips jpeg via sharp 0.35.5 (mozjpeg:false) on one 1920×1080 JPEG → q80. Warm medians (7 rounds after 1 warm-up): cjpeg 385 ms / 675,128 B vs libvips jpeg 31 ms / 675,714 B (~12×). Context: sharp mozjpeg:true 308 ms / 546,546 B. Fixture /workspace/bench-mozjpeg-libvips/. cjpeg timed with spawn + PPM read.
Hands-on5 Oct 2026 · 4 min