Performance budgets for websites that need to stay fast
Explicit limits for JavaScript, images, fonts, and third-party scripts keep speed from becoming a one-time project.
A fast launch is not the same as a fast website. Without boundaries, every new campaign, widget, and analytics script slowly consumes the performance you worked to create.
Make the budget visible
Set measurable limits for initial JavaScript, the largest image, font files, and third-party work. Review those limits with each meaningful change.
Prefer useful HTML
Server-rendered content gives readers and crawlers meaningful information before client JavaScript runs. Interactive components should be small and intentional.
Watch real users
Lab scores provide a controlled baseline. Real-user metrics show how the site behaves on actual devices and networks. Both are needed to keep a performance budget honest.