Find the real performance bottlenecks and fix them in the right order.
Updated Jul 9, 202614 min readGutoFlow editorial
Measure before optimizing, then fix the largest user-visible bottleneck instead of chasing a perfect score through low-impact tweaks.
Measure the published page
Capture field data when available and reproduce slow paths with a clean browser profile. Separate server delay, asset weight, layout shift, and main-thread work before choosing a fix.
Reduce asset cost
Right-size images, limit font files and weights, and remove scripts that do not justify their runtime cost.
Compress the actual rendered image dimensions
Preload only critical assets
Delay nonessential third-party scripts
Protect visual stability
Reserve media space, avoid late font swaps, and keep initial animations from moving essential content. Retest after publishing because production delivery changes the result.