You’ve probably seen the tweet. The one where a developer brags about rewriting a terminal text animation tool in Rust and getting a 27x speedup. Your first thought? Cool, I guess? Your second thought? Wait, why would I even want that?
Let me paint the picture. There’s a tiny Ruby gem called ttfx that adds a few fancy color fades and typewriter effects to your terminal output. Pure eye-candy. The kind of thing you show off once in a demo and then forget about. Someone—the same person who created Ruby on Rails, no less—decided that this trivial library needed to be rewritten in Rust. The result: a 27x performance improvement.
If your terminal text animation is too fast to appreciate, you’ve optimized the wrong thing.
Here’s the tension that nobody’s talking about. These effects are meant to be seen by humans. They’re aesthetic. They’re slow by design—the whole point is that the text appears letter by letter, or the color fades gradually. A 27x speedup doesn’t make the experience better; it makes the animation invisible. The letters flash so fast they might as well appear instantly. Congratulations, you’ve just optimized the magic out of the spell.
But this isn’t just one weird project. This is a symptom of a cultural obsession. We’ve reached the point where developers are applying hardcore systems programming to purely cosmetic features, not because it improves the user experience, but because it’s a technical flex. It’s the engineering equivalent of building a nuclear reactor to power a nightlight.
The 27x speedup is a flex, not a feature.
I’ve been in this industry long enough to see the pattern. First, it was “rewrite everything in Go.” Then came “rewrite everything in Rust.” But the justification was always about performance-critical systems—servers, databases, browsers. Now we’re optimizing terminal text effects. The threshold has shifted. The expectation now is that all software, regardless of its purpose, must be hyper-optimized. Even the stuff that’s supposed to be slow and charming.
Let me tell you what I saw when I ran the original Ruby version. The text appeared letter by letter, with a gentle pause. It felt like reading a story being told by a friend. The Rust version? It spat out the entire paragraph in a blink. Technically faster. Emotionally empty.
We’ve optimized our tools so aggressively that we’ve sacrificed the human experience they were built to serve.
This is the moment where we need to ask ourselves: what are we actually optimizing for? Speed? Or delight? The Ruby version took 27x longer, but it gave you time to read, to anticipate, to enjoy the reveal. The Rust version is objectively faster, but it’s also objectively worse at being a text animation.
I’m not saying stop using Rust. I’m not saying stop optimizing. I’m saying choose your battles. If you’re building a real-time trading system, absolutely go for that 27x speedup. But if you’re building a terminal easter egg, maybe let it be slow. Let it breathe. Let it be human.
Because the next time you show off your 27x faster terminal effects, someone will say, “That’s cool, but I can’t even see the animation.” And they’ll be right.
FAQ
Q: Isn't 27x faster always better?
A: Not when the feature is designed to be perceived slowly. Terminal text animations rely on timing—speed them up too much and you lose the aesthetic effect entirely. The 27x improvement is a technical achievement, but a UX failure.
Q: What's the practical implication for developers?
A: Think twice before applying low-level optimizations to user-facing features that rely on timing or pacing. Just because you can make something faster doesn't mean you should. Performance is a feature, but so is rhythm, pacing, and delight.
Q: Isn't this just a harmless fun project?
A: On its own, yes. But it's a symptom of a broader cultural trend where 'rewrite in Rust' becomes a default answer even for problems that don't benefit from it. The danger is that we normalize hyper-optimization as the only valid approach, losing sight of what actually matters to users.