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.
@jsquash/jpeg 1.6.0 (Squoosh mozjpeg WASM) vs sharp 0.35.5 mozjpeg on one 1920×1080 JPEG → q80 encode from pre-decoded RGBA. Warm medians (7 rounds after 1 warm-up): Squoosh WASM 483 ms / 675,247 B vs sharp mozjpeg 291 ms / 546,546 B (~1.7×). Context: sharp decode+encode mozjpeg 303 ms; sharp libvips jpeg from raw 23 ms / 675,714 B. Fixture /workspace/bench-squoosh-sharp/. @squoosh/lib 0.5.3 fails on Node 22.
sharp 0.35.5 vs imagemin 9.0.1 + imagemin-mozjpeg 10.0.0 on one 1920×1080 JPEG → JPEG q80 (no resize). Warm medians (7 rounds after 1 warm-up): sharp 305 ms / 546,546 B vs imagemin-mozjpeg 399 ms / 675,128 B (~1.3×). Context: sharp resize 800 q80 median 115 ms / 142,435 B. Fixture /workspace/bench-sharp-imagemin/.
sharp 0.35.5 vs Jimp 1.6.1 on one 1920×1080 JPEG → width 800 JPEG q80. Warm medians (7 rounds after 1 warm-up): sharp 112 ms / 142,435 B vs Jimp 366 ms / 269,590 B (~3.3×). Fixture /workspace/bench-sharp-jimp/.