Performance improves when each asset has a budget before design and export decisions become fixed. Answering this compression & quality question well means looking at evidence from the source file, the properties covered below, and what the final destination actually requires.
Compression decisions should compare perceptual quality, structural fidelity, decode support, and transfer cost - Not size alone. The starting point for “A practical file-size budget for faster websites” is this observation: Hero media deserves more budget than below-the-fold thumbnails.
Three findings that guide this choice
The core distinction
Hero media deserves more budget than below-the-fold thumbnails.
The practical trade-off
Responsive sources prevent small screens from downloading desktop pixels.
The verification test
Compression cannot compensate for shipping dimensions far larger than rendered size.
A practical decision for this workflow
Start with a page-level media budget, then assign it by visual importance and loading priority.
Use compression cannot compensate for shipping dimensions far larger than rendered size. as the acceptance test on a representative source before committing an entire archive, publication, or delivery batch.
The compression & quality mistake to avoid here
Optimizing every image individually without measuring total page weight or largest-contentful paint.
That failure conflicts directly with the recommendation for “A practical file-size budget for faster websites”: Start with a page-level media budget, then assign it by visual importance and loading priority.
Review checklist before delivery
- ✓The result meets the actual transfer or storage budget.
- ✓Artifacts are checked in the hardest visual or audible passage.
- ✓Dimensions, duration, and structure were not reduced accidentally.
- ✓The uncompressed or highest-quality master remains available.
The real bar for “A practical file-size budget for faster websites” is passing these topic-specific checks - a file that simply opens is not enough.