Image Compression Engineering: Lossless vs Lossy, WebP & Core Web Vitals
Unoptimized images account for over 60% of total web page weight. Heavy assets slow down initial page rendering, degrading Google's Largest Contentful Paint (LCP) metric and damaging search rankings.
Lossy vs. Lossless Compression Explained
Lossless algorithms (PNG, WebP Lossless) reorganize data without discarding information, achieving typical size reductions of 15% to 30%. Lossy compression (JPEG, WebP) discards high-frequency chrominance details imperceptible to human vision, slashing file sizes by 60% to 85% with minimal perceptual loss.
Frequently Asked Questions
WebP and AVIF offer superior compression compared to traditional JPEG and PNG, providing 30% smaller files at identical visual fidelity.
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