[nucliweb]

What

JPEG XL vs AVIF for web use-cases (Jake Archibald, 2026) and its benchmark, image-codec-bench, measure things this tool does not yet. ROADMAP.md gains them as ideas, not commitments:

• More codecs: jixel, a second JPEG XL encoder (Rust, BSD-3-Clause) that the post finds much closer to AVIF than libjxl on photographs (+11–12% vs +41–50%); an opt-in variant like rav1e and SVT-AV1. No CLI, so the image would build a wrapper.
• Encode memory: peak resident memory from the /usr/bin/time wrapper every encode already runs under (-v GNU, -l BSD).
• Tool versions in the results: encoder, decoder and metric versions in the CSV and the report.
• An independent second metric: optional ColorVideoVDP, outside the default image (Python + PyTorch, ~1 GB).
• Decode with platform decoders: Apple ImageIO (sips) and browsers, plus decode time; the HEIC 4:2:0 lesson already shows a 1.5–8.4 point libheif vs ImageIO gap.
• Demo material: an image with alpha; all seven demo images are opaque.