04.5.5 · Skill in Performance engineering
Performance budgets
Limits on page weight, load time or latency that a team agrees not to exceed.
A performance budget turns speed into a constraint that is checked automatically, often in CI. It stops slow creep, one dependency at a time. Budgets work best when tied to metrics users feel, such as Core Web Vitals.
Resources
1- articleStart hereWeb vitals ↗web.dev (Google) · 2020 · 12 min
The three metrics Google uses for loading, responsiveness and visual stability, and their thresholds.
Tools
1- ToolOpen sourceLighthouse
Open-source audits for performance, accessibility, SEO and best practices, built into Chrome.