[miohtama]

On Mac, you can find Compressed memory in Activity monitor.

It’s something similar to swap - apps do not need to have built in support for it.

[flatiron]

It segments a certain amount of ram to “swap” to which means compress and store. Normal blue sky ram operations are not compressed on macOS

[smcleod]

Many operations are actually a lot faster with compressed memory than without. It's all about where the bottleneck is.

[comboy]

Oh, yes compressed swap makes much more sense, thanks.

[kergonath]

It is not compressed swap, the compressed data is still in RAM. The OS just compresses inactive memory, with a couple of criteria to define “inactive”.