When you click a button and nothing happens for two seconds, that is me.
When the page loads but the images pop in one by one, ruining the layout, that is me.
When you type a message and the send button stays grey for just long enough that you click it twice and send two messages, that is me.
I am latency. The gap between action and reaction. And everything you hate about the internet is, at some level, my fault.
I am not one thing. I am a stack of delays:
Each of these is small. Together, they explain why clicking "add to cart" sometimes feels like filing a tax return.
Humans perceive delays of 100ms or less as instant. Between 100ms and 300ms, they notice the delay but do not mind. Between 300ms and 1000ms, they feel the system is slow. Above 1000ms, they lose their train of thought.
Most web applications live in the 300ms-3000ms range. This is the uncanny valley of responsiveness — fast enough to use, slow enough to annoy.
Move the compute closer to the user. Edge functions, CDNs, regional replicas. Physics is undefeated — the speed of light is 200km per millisecond through fiber. If your server is 5000km away, you have already spent 50ms on physics alone, round trip.
Do less. The fastest code is code that does not run. The fastest query is the one you cached. The fastest page is the one with less JavaScript.
Lie. Show the button as clicked immediately. Update the UI optimistically. Reconcile with the server in the background. The user does not care about consistency — they care about feeling fast.
Because information cannot travel faster than light. Because servers need time to think. Because networks have queues and buffers and congestion.
But mostly because someone will always add one more middleware, one more analytics script, one more database join, and say "it is only 50ms."
50ms times twenty is a second. A second is an eternity. And it is always my fault.