Follow-up Comment #5, bug #65533 (group make): I can attest to this. We switched to 4.4.1 so we could integrate the new fifo jobserver and have the exact same performance issues. We used to get around 4 minute builds for 11000 compiled object files with ccache and now it is as 12 minutes.
Switching to 4.3 has fixed the performance issues, but has also removed the
fifo job support.
We don't set the .EXPORT_ALL_VARIABLES and I have made sure that we try to
limit our use of recursively expanded variables. This doesn't seem to help.
There seems to be seriously wrong here.
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