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Hacker News·28d ago·5 min read
The case against JPEG XL
TL;DR
JPEG XL, a promising image codec, was initially rejected by Chrome in 2023 but is now seeing renewed interest with a Rust decoder integrated into Firefox and Chrome. This shift may protect the Web from past vulnerabilities and validate JPEG XL's role in modern image compression.
✦ Why It Matters
Consider advocating for JPEG XL in your projects to enhance image compression and web performance.
Key Takeaways
- Consider AVIF for superior lossy compression efficiency.
- Evaluate decoding speed when choosing an image codec for web use.
- Be cautious of JPEG XL's marginal advantages in specific scenarios.
- Explore JPEG XL's potential in non-web applications.
Full Summary
JPEG XL is an advanced image codec that offers improvements over JPEG and versatility beyond WebP, yet it was rejected by Chrome in 2023. Despite its technical merits, including lossless compression, JPEG XL struggles to compete in lossy compression efficiency, where other codecs like AVIF excel.
The author, a compression engineer, highlights that JPEG XL's advantages are marginal, with only a 12% size reduction over lossless WebP in specific scenarios. Additionally, JPEG XL's decoding speed is slower than AVIF, raising concerns about its practicality for web applications.
The codec's complex features, while impressive, may not align with the web's need for fast, efficient image delivery. Ultimately, the author believes JPEG XL may find its niche outside the web, but its role in browsers remains questionable.