The full answer
Performance is easier to protect than to recover. Creuto agrees targets early, such as page load times, API response times and app launch time, and checks them during development rather than discovering problems after launch.
On the web, techniques include server-side rendering and static generation with Next.js, responsive and modern image formats, splitting JavaScript so pages load only what they need, and serving content through a content delivery network.
On mobile, the team focuses on fast start-up, smooth scrolling and animation, efficient network usage and sensible offline caching. Apps are profiled on real devices, including older and lower-end phones that many users still carry.
Backend performance relies on well-indexed queries, caching, pagination and background processing for slow tasks. Monitoring tools in production track response times and errors so regressions are spotted quickly.
For existing products, Creuto can run a performance audit that identifies the biggest bottlenecks and fixes them in order of impact, which is often quicker and cheaper than a rebuild.