faster 'opam config -env'

[UnixJunkie]

Hello,

It would be nice if this is made faster, because it slows down
the opening of new terminals for people who are used
to use a lot of them (because of the OPAM lines in ~/.bashrc).

Regards,
F.

[Chris00]

I was going to open the very same issue. On my system

$ time opam config -env
...
0.51user 0.02system 0:00.60elapsed 88%CPU (0avgtext+0avgdata 8168maxresident)k
0inputs+0outputs (4major+3195minor)pagefaults 0swaps

As a comparison:

$ time opam config --version
0.9.2
0.00user 0.00system 0:00.01elapsed 75%CPU (0avgtext+0avgdata 4696maxresident)k
0inputs+0outputs (0major+738minor)pagefaults 0swaps

[samoht]

Right, now we are approaching 600 packages, I guess it's time to profile OPAM a little bit more carefully. So please, do not hesitate to report slow-down; you can also export OPAMSTATS=1 to get some raw stat numbers.

[UnixJunkie]

Hi,

I'm running opam version 0.8.3
Will it go faster if I update to the last zip you published in the tags?

Regards,
F.

[samoht]

The (very big) speed-ud is in master. I haven't tagged 0.9.2 yet, so you'll need to install from sources.