Silly Question About Timing

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Hi all,

This is a bit silly but I'm trying to time how long it takes to enter
a Git controlled directory. I guess this is more of a GNU/Linux
question then anything else.

I've noticed that entering a Git controlled project directory takes
quite some time so I wanted to measure exactly how much (it's the
prompt I'm using that's taking the time, I suspect). I first tried (a
bit naive, I admit :-) )

time cd my-project

This doesn't work of course. Obviously, writing a script doesn't work
either because then the prompt isn't calculated. Next I tried

date +%H:%M:%S.%N ; cd my-project-abc ; date +%H:%M:%S.%N

but, surprisingly (to me), that doesn't work either. It simply prints
the two timestamps and *then* does the cd (or, at least, that's how it
seems to behave).

So how would one do this? :-)

Cheers,
Hilco

P.S. This slow cd is only the first time, afterwards things have been cached.
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