Performance optimization Advanced
Auditing a theme: what it loads versus what it uses
Themes routinely ship assets for features you never use. Once you have the list, what can safely go and what cannot becomes obvious.
Technote
Performance optimization
Caching, Redis, Core Web Vitals, image optimisation and query tuning — everything that makes WordPress fast, grounded in measurements rather than folklore.
35 articles· Performance optimization
Performance optimization Practical
The hidden cost of an embedded video
The player loads whether or not anyone presses play. A poster-first approach charges that cost only to the people who actually click.
Performance optimization Advanced
Metric overrides: stopping the jump when the font lands
Text jumps when a webfont lands not because it was late, but because the fallback had different widths and heights. Match the two and the swap leaves the…
Performance optimization Practical
Measuring how speed reaches revenue on your own site
"One second costs you X percent" is someone else's number. Your drop-off points are yours to measure — and measuring them is not hard.
Performance optimization Practical
Feeling slow is not the signal to upgrade
Problems that a bigger plan fixes and problems it never touches are separate from the start. Upgrade without telling them apart and you have spent money and kept…
Performance optimization Practical
Where SVG belongs, and where it does not
Icons and diagrams need not be image files. Kept as vectors they need no size variants, and their colour can be driven from CSS.
Performance optimization Practical
font-display: invisible text or shifting text
This property decides what happens in the few hundred milliseconds before a webfont lands. There are five values, but the real choice is between blank text and text…
Performance optimization Practical
Thirty seconds before you upload a photo
What a camera or phone produces is far larger than a screen ever needs. Three quick adjustments before uploading make a visible difference to the first screen.
Performance optimization Intro
Check your own visitors, not the industry average
"Most traffic is mobile these days" is not an answer about your site. Your answer is already in your own analytics, ten minutes away.
Performance optimization Practical
The one image you must never lazy-load
Lazy loading is right for nearly every image. Apply it to the large image in the first screen and you delay the very thing the metric measures.
Performance optimization Practical
Subsetting Korean: not downloading all 11,172 syllables
There is no mystery to why Korean fonts are heavy: modern Hangul alone has 11,172 syllable blocks. Split with unicode-range, the browser fetches only the pieces a page…
Performance optimization Intro
What happens in the seconds before your page appears
Visitors do not remember load time in seconds; they remember an impression. What shapes it is not the wait but what they see during it.