The conventional wisdom on this topic is mostly wrong. Here's why.
Getting API Design right from the start saves enormous amounts of time later. I learned this the hard way on a project that required a complete rearchitecture at month six. Here is what I wish I had known before writing the first line of code.
Why Consistency Trumps Intensity
I want to talk about code splitting specifically, because it's one of those things that gets either overcomplicated or oversimplified. The reality is somewhere in the middle. You don't need a PhD to understand it, but you also can't just wing it and expect good outcomes.
Here's the practical framework I use: start with the fundamentals, test them in your own context, and adjust based on what you observe. This isn't glamorous advice, but it's the advice that actually works. Anyone telling you there's a shortcut is probably selling something.
This next part is crucial.
The Role of tree shaking
Let's talk about the cost of API Design — not just money, but time, energy, and attention. Every approach has trade-offs, and pretending otherwise would be dishonest. The question isn't 'is this free of downsides?' The question is 'are the benefits worth the costs?'
In my experience, the answer is almost always yes, but only if you're realistic about what you're signing up for. Set your expectations accurately, budget your resources accordingly, and you'll avoid the burnout that comes from going all-in on an unsustainable approach.
Beyond the Basics of automated testing
The concept of diminishing returns applies heavily to API Design. The first 20 hours of learning produce dramatic improvement. The next 20 hours produce noticeable improvement. After that, each additional hour yields less visible progress. This is mathematically inevitable, not a personal failing.
Understanding diminishing returns helps you make strategic decisions about where to invest your time. If you're at 80 percent proficiency with automated testing, getting to 85 percent will take disproportionately more effort than going from 50 to 80 percent. Sometimes 80 percent is good enough, and your energy is better spent improving a weaker area.
The Mindset Shift You Need
Seasonal variation in API Design is something most guides ignore entirely. Your energy, motivation, available time, and even continuous integration conditions change throughout the year. Fighting against these natural rhythms is exhausting and counterproductive.
Instead of trying to maintain the same intensity year-round, plan for phases. Periods of intense focus followed by periods of maintenance is a pattern that shows up in virtually every domain where sustained performance matters. Give yourself permission to cycle through different levels of engagement without guilt.
Here's where it gets interesting.
Quick Wins vs Deep Improvements
Documentation is something that separates high performers in API Design from everyone else. Whether it's a journal, a spreadsheet, or a simple notes app on your phone, recording what you do and what results you get creates a feedback loop that accelerates learning dramatically.
I started documenting my journey with query caching about two years ago. Looking back at those early entries is both humbling and motivating — I can see exactly how far I've come and identify the specific decisions that made the biggest difference. Without documentation, all of that would be lost to faulty memory.
Real-World Application
There's a technical dimension to API Design that I want to address for the more analytically minded readers. Understanding the mechanics behind load balancing doesn't just satisfy intellectual curiosity — it gives you the ability to troubleshoot problems independently and innovate beyond what any guide can teach you.
Think of it like the difference between following a recipe and understanding cooking chemistry. The recipe follower can make one dish. The person who understands the chemistry can modify any recipe, recover from mistakes, and create something entirely new. Deep understanding is the ultimate competitive advantage.
Making It Sustainable
The biggest misconception about API Design is that you need some kind of natural talent or special advantage to be good at it. That's simply not true. What you need is curiosity, patience, and the willingness to be bad at something before you become good at it.
I was terrible at message queues when I first started. Genuinely awful. But I kept showing up, kept learning, kept adjusting my approach. Two years later, people started asking ME for advice. Not because I'm particularly gifted, but because I stuck with it when most people quit.
Final Thoughts
What separates the people who talk about this from the people who actually get results is embarrassingly simple: they do the work. Not perfectly, not heroically — just consistently. You can be one of those people.