Every time a new digital product is released, the conversation usually centres on features. Teams proudly announce new capabilities, redesigned interfaces and smarter functionality because those are the things people can immediately see. Performance rarely gets the same attention.
In many cases, it only becomes part of the conversation when users begin complaining or analytics reveal that something has gone wrong.
I have always found that surprising because performance is one of the first things users experience. Before they admire a beautifully designed interface or discover an innovative feature, they experience how quickly the application responds.
Before they complete a purchase, sign up for a service or return for a second visit, they have already formed an opinion about the product based on how it feels to use. That first impression is often created long before they notice any feature the development team worked so hard to build.
From my experience as a frontend engineer building modern web applications, I have realised that one of the biggest mistakes our industry makes is treating performance as a technical metric instead of a human experience.
We spend time measuring Core Web Vitals, bundle sizes and loading speeds because they give us numbers to improve. Users, however, never think about those metrics. They remember whether the application responded when they expected it to, whether navigation felt effortless and whether they could complete a task without unnecessary delays.
One lesson that has stayed with me throughout my career is that users rarely complain about poor performance. They simply change their behaviour.
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They leave before a page finishes loading. They abandon transactions that take too long. They become less engaged without consciously knowing why. Eventually, they stop returning altogether.
Businesses often spend months analysing declining engagement, lower conversion rates or customer retention without recognising that the browser had already answered the question. Every unnecessary delay quietly reduced the user’s confidence in the product until leaving became easier than waiting.
Another misconception I continue to see is the belief that performance optimisation begins after development. In reality, performance decisions are made long before anyone opens an optimisation tool or reviews a performance report.
They begin when developers decide which libraries to install. They begin when designers introduce increasingly complex interfaces. They begin when product teams continue adding features without asking whether every new addition genuinely improves the user’s experience.
I have worked on projects where every engineering decision appeared reasonable on its own. A new package reduced development time. Another dependency introduced useful functionality. Rich animations created a more polished interface. Additional scripts generated deeper business insights.
None of those decisions looked problematic individually. Together, however, they gradually transformed lightweight applications into products that demanded far more from users’ browsers than was ever necessary.
That experience completely changed the way I think about frontend development.
Today, one of the most valuable questions I ask is not, “Can we build this?” but, “Does this create enough value to justify its cost?” Every feature carries a cost beyond development time. Someone’s browser has to download it.
Someone’s device has to process it. Someone with a slower internet connection has to wait for it. Those are costs users experience even if developers never notice them while testing on powerful machines with fast internet connections.
One insight I think developers should pay more attention to is that browsers are remarkably honest. They do not care that a framework made development easier or that a dependency solved a complex engineering problem.
They simply execute every instruction we give them. When applications become slow, browsers are often reflecting the accumulation of hundreds of small engineering decisions rather than one significant mistake.
Performance is also closely connected to trust.
When users click a button and nothing happens immediately, they rarely think about rendering pipelines, asynchronous requests or server latency.
They simply wonder whether the application is working. Every unnecessary delay introduces uncertainty, and uncertainty quietly erodes confidence. Trust is difficult to earn, remarkably easy to lose and often influenced by experiences users cannot even explain.
Another observation I continue to make is that the best performance improvements are often invisible. Removing unnecessary code has frequently created greater value than introducing new functionality.
Simplifying component structures has delivered more noticeable improvements than adopting another development tool. As developers, we naturally enjoy building things. Experience has taught me that knowing what not to build is just as valuable as knowing what to build.
Performance should never become an afterthought. It deserves a place in every conversation from the very beginning because every architectural decision, every design choice and every product requirement eventually shape how users experience the software. Waiting until users begin reporting slow performance usually means the problem has existed far longer than anyone realised.
Technology will continue to evolve. New frameworks will emerge, browsers will become smarter and development tools will become even more capable. But one thing will remain constant. Users will always value products that respect their time.
Performance remains the most overlooked feature in modern web development. Ironically, when it is done exceptionally well, users rarely notice it. They simply enjoy an experience that feels effortless, accomplish what they came to do and leave with confidence in the product.
That is what great frontend engineering has always been about. It is not simply writing code that works. It is building experiences that remove friction, earn trust and allow technology to quietly get out of the user’s way.
Ojonugwa Martins Onogu is a frontend engineer experienced in building scalable web applications across fintech and enterprise technology. He specialises in React, Next.js and TypeScript, with a particular interest in frontend architecture, performance engineering, accessibility and creating user experiences that are both fast and intuitive.
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