The images a bed stocks are almost entirely the same bytes: the base they share
is 227 MB and a module's own code is a few. Exported one at a time that base is
written, pushed and loaded once per image — for this bed, the same 227 MB crossed
thirty-odd times, and the whole set measured 9.7 GB.
Measured on eight of them: 2.24 GB as separate archives, 0.29 GB as one. 87 per
cent less, and it improves with the count.
This is the slowest thing a raise does, and the four-machine bed has been
exceeding its own ninety-minute limit while still copying — so it was failing on
the clock rather than on anything it was testing.
Also stops shipping a compiler in every module image. The image runs compiled
code and never compiles any; tsc runs on the workstation. Worth 26 MB an image,
which is small beside the above but was pure waste.
jschoubben