Web performance is often discussed as a conversion or search-ranking concern. It is also an accessibility issue. A page that requires a powerful phone, large data transfer or stable broadband may be effectively unavailable to many users.
Heavy JavaScript can delay interaction even after visible content appears. On lower-cost hardware, parsing and executing code may take longer than downloading it. Reducing unnecessary client-side work can improve the experience without changing the visual design.
Images are another common source of waste. Correct dimensions, modern formats and responsive delivery reduce bandwidth while preserving quality. Decorative media should not block access to essential information.
Performance also affects assistive technology. Constant layout shifts, delayed controls and interface elements that appear after focus has moved can make navigation confusing. Stable structure benefits keyboard and screen-reader users as well as everyone else.
A useful performance process measures real devices and networks, not only a developer laptop. Automated tests are valuable, but field data reveals how the site behaves for actual visitors.
The fastest page is not automatically the most accessible, and accessibility requires much more than speed. Still, performance is part of inclusive design because it determines who can successfully reach and use the content.