Web Design and Development en New York
How we work in New York
Four thousand miles are a floor you cannot optimize away
Light travels through fiber at about two thirds of its speed in a vacuum. A round trip over that distance costs tens of milliseconds before anyone writes a line of code, and the actual route is not straight. That floor does not come down: you only decide how many times you pay it.
A redirect costs a full round trip
The hop from no-www to www, the one from http to https and the trailing-slash one all look free from here. Each is a complete round trip before the first useful byte. Chained, that is three of them. They get resolved at the origin, with one direct hop.
The first response comes from the origin and is almost never cached nearby
A content delivery network keeps copies close to the viewer, and for images, styles and scripts it works. For the document that carries a session, a cart or a calculated price, it does not: that response travels the whole way. So we measure time to first byte separately, because that is what gives the distance away.
Chained requests, multiplied distances
If the page asks for one piece of data, uses the answer to ask for the next and that one for a third, the distance gets paid three times. In parallel it gets paid once. The difference is not the size of what travels, but how many turns it takes before anything can be drawn.
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