Speeding up importing Phobos files

[FeepingCreature]

On Saturday, 19 January 2019 at 09:08:00 UTC, Walter Bright wrote:
> On 1/19/2019 1:00 AM, Temtaime wrote:
>> C'mon, everyone has a SSD, OS tends to cache previously opened 
>> files. What's the problem ?
>> Better speedup compilation speed.
>
> You'd think that'd be true, but it isn't. File reads are fast, 
> but file lookups are slow. Searching for a file along a path is 
> particularly slow.

If you've benchmarked this, could you please post your benchmark 
source so people can reproduce it? Probably be good to gather 
data from more than one PC. Maybe make a minisurvey for the 
results.