React and Next.js app performance profiling and optimization, with numbers

Three ways to work with us, each measured before and after so you can see what changed.

• Starter - $18.99, delivered in 2 days. Lighthouse and profiler run on one page of your app, with findings ranked by the payoff of fixing them. Covers one page, 1 revision, no code changes.
• Standard - $187.99, delivered in 4 days. Starts with the same audit, then moves on to the fixes that actually shift the numbers. Includes source code and 2 revisions.
• Advanced - $437.99, delivered in 8 days. A deeper pass across up to 5 routes, covering rendering and caching, with a bundle budget wired into CI so gains hold up over time. Includes source code and 3 revisions.

To get started we need the domain the order applies to and a short brief describing what you want checked.

Choose this service if slow pages might be costing you signups or search visits, and you want to improve the app you already have rather than rebuild it. React and Next.js already give you most of what a fast site needs, so the wins usually come from using the framework properly rather than switching to something else.

You get concrete measurements rather than opinions: load speed, layout stability and responsiveness figures, along with bundle size for each route, captured on a throttled connection before work starts and again once it is done, laid out side by side in a table.

Starter covers an audit of a single page: the test runs, the findings sorted by how much they are worth fixing, and no code touched. Standard builds on that same audit and puts the remaining time into the fixes that move those figures. Advanced extends this across as many as 5 routes, tunes how pages render and cache, and leaves a bundle budget inside your CI pipeline so a future release cannot undo the improvements without anyone noticing.

All work is done on a branch in your own repository, one commit at a time, each explained. Nothing gets deployed on your behalf unless you ask.

There are no calls. Everything is put in writing, including any measurement that contradicts our own expectations.

How the work proceeds

• We first record what your users experience: Lighthouse checks on your live pages and a profiling session on the slower ones, run on a throttled connection, with the key figures logged per route before anything changes.
• Next we identify the biggest costs by examining the bundle and the network waterfall - unused code, anything blocking the first paint, and components re-rendering without good reason. Each finding is given an estimated saving in milliseconds or kilobytes.
• Then we fix issues starting with the largest gains: splitting code, handling images and fonts properly, clearing render-blocking work, adding memoisation where the profiler points to it, and moving data fetching off the critical path. Each change is its own commit with a stated reason.
• We then measure again on the updated build, setting the before and after figures side by side per route and per metric. Where a change makes something worse, the table shows it and that change is reverted.
• Finally, we hand everything over inside your repository: a branch or patch, the written report, and an honest note on what was left undone and what it would take to address it. Deployment remains entirely your decision.

What happens after you buy

Your order opens its own thread here the moment it is paid, and everything about that order - questions, changes and the final report - happens in it.

Questions people ask