I want to make my app faster but I don't actually know where the time goes. Before changing anything, I want a measured baseline. Set up measurement and produce a baseline report: 1. Front end: for my key pages (landing, signup, the main app screen, the heaviest data screen), capture load metrics: time to first byte, first contentful paint, largest contentful paint, total blocking time, total page weight and request count. Use a throttled connection profile, not my fast dev machine on localhost. 2. Back end: identify my slowest endpoints and database queries. Add timing where it's missing (request duration logging, slow query logging). List the top offenders with actual numbers. 3. Separate the time into buckets per page: network, server processing, database, client rendering, third-party scripts. I want to know which bucket dominates. 4. Rank the findings by impact: what single fix would help the most users the most? Distinguish 'feels slow' issues (rendering, layout) from 'is slow' issues (server, queries). Don't optimize anything yet. Don't recommend changes without measurements behind them. The deliverable is the baseline report: numbers per page and per endpoint, the time breakdown, and a ranked list of where optimization effort will pay off. This becomes the 'before' I compare against after fixes.