[tracker1]

Not to mention, you can get better compression with some pre-compression levels that are hard to match with the best on the fly, often getting another 10% or more on size. It all adds up.

There are some Steve Souders books on optimization that are pretty good and still pretty relevant.

[ijustlovemath]

If you minify, aren't you increasing the overall information entropy, and thereby decreasing the amount that can be gained from compression? I'm sure overall there's still a net gain but I wonder where the point of inflection is.

[tracker1]

Depends on the algorithm... the ones used with http typically have less overhead for decompression than compression.

If you mean code minification, that can depend, but in general with tree shaking it shouldn't be slower, typically. The computer doesn't care if a variable is aa or myDescriptiveVariableName.

[ricardobeat]

In my experience things kind of balance out, and you end up with negligible compression gains after compression. On the other hand, it also affects the time it takes for the browser / js engine to parse and execute the code, which can be significant in this world of massive bundles.