unix: call ulimit -n
to avoid overheads
#468
Merged
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See inline comment in
base.Dockerfile
for why this hack is necessary.When upgrading my machine recently, the
rlim_max
value increased to ~1B, makingapt-get
invocations take multiple minutes to complete. https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1332440 seems to describe this issue.The cross building images have a sufficiently new apt that doesn't seem impacted.