Toot

@manawyrm … see LZ4 really being a significant sink of CPU cycles

once you made the root FS read-only (and thus faster to mount), you can already boot, while, if necessary at all, your system starts mounting your persistent mutable storage. Here, again, same considerations as for the kernel image apply regarding compression: an SD card is so much slower than a CPU, it'd be surprising if the time saved by not reading twice the amount of data was not outweighing the energy cost

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