It's not cached ATM. Something like CB:34992 could do it however. So the question is whether decompressing to uncached ram is worth the size reduction and therefore slow SPI reads. I guess this needs measuring.

Yeah, you can profile it, but in my experience, decompressing in uncached memory is prohibitively slow. I mean, fundamentally, all it does is memcpy() small amounts from the previously written areas over and over again.

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