WITH_META_MODE on buildworld is amazing.

I have toyed with ccache on the world before, but I found on a first build it completely bottlenecked I/O, it increased my uncached build times by 400-500%. I guess only viable with SSD scratch storage for it.

On updating my first machine to 12-STABLE, I noticed this new option, and the way it works compared to ccache is revolutionary. It effectively obsoletes ccache for world/kernel compiling.

I rebuilt the world to disable reproducible build binaries (want to see proper info on uname). It was done in under a minute.

Thank you to whoever implemented this feature.
 
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