Response compression: what to get right first

The gap between knowing this and actually doing it is where most teams lose ground. If you only fix one thing about response compression this quarter, make it the first item below.

Performance work is mostly subtraction, which makes it unpopular and effective. The failure mode is not doing it wrong, it is doing it once and assuming it stays done.

Start here

Text compresses dramatically and costs almost nothing to enable. That sounds obvious written down. It is still the thing most often skipped. The practical test is whether someone new to the project could tell, in a minute, that it had been handled.

Then this

Modern algorithms beat older ones by a useful margin. There is a version of this that is over-engineered, and it is worth avoiding. The practical test is whether someone new to the project could tell, in a minute, that it had been handled.

Eventually

Already-compressed formats gain nothing from it. The reasoning matters more than the rule, because the rule has exceptions. Most teams find the first pass takes an afternoon and the maintenance takes minutes a month.

In practice

Real-world numbers from actual visitors matter more than a score produced on a fast laptop. Three things worth confirming about response compression before you move on:

• Someone can say what the current setup is without going to look
• Modern algorithms beat older ones by a useful margin — and you know whether that is true here
• There is a way to tell whether the last change to this helped

Most of the value here comes from doing the first two things, not all of them.