Speeding up importing Phobos files

[Vladimir Panteleev]

On Saturday, 19 January 2019 at 08:45:27 UTC, Walter Bright wrote:
> This can be a fun challenge! Anyone up for it?

This might get you some speed for the first compilation (fewer 
directory entry lookups), but I would expect that follow-up 
compilations to have a negligible overhead, compared to the CPU 
time needed to actually process the source code.