installation is very long

[jcohenadad]

it hangs at "Processing /Users/julien/code/sct" for ~10min. Could this be reduced?

[poquirion]

@jcohenadad,
I have tied to reproduce from the tip of master but could not. It does hang on Processing /home/poquirion/test/sct but only for 5-10 sec. It happens at the pip install $SCT_DIR step, not in the sct.

[poquirion]

Wait it did hang for a while once. Seems to be intermittent.

[zougloub]

I'll try to reproduce the isue on my mac when back home as I don't see this when doing a full package install on Linux.
Do you have a way to trace what is blocking on your system (something like strace) ?

[jcohenadad]

@zougloub: sorry i'm not sure how to use strace (i guess the mac equivalent would be dtrace)

[zougloub]

I tried to look at the issue a few weeks ago but had some permission issues to use dtrace... will check again soon. The issue is still relevant?

[jcohenadad]

on a Mac OSX 10.10.5 using version cf64e93, this step: Processing /Users/julien/code/sct now takes about 35s, which I guess is acceptable.
I will try on other stations and maybe we can close this issue it it remains at acceptable durations.

[zougloub]

The issue is still relevant... even Travis has it.

[zougloub]

Upstream pip issue: pypa/pip#2195

[zougloub]

pip v10.0.0 (not yet released) has merged pypa/pip#4764 which is addressing the slowness issue.
In 9ec9e86 I modified the installer to use the master branch of pip, until pip 10 is released.
IMHO this shouldn't be too unsafe, but we could also access a specific commit.

[zougloub]

Implemented conditional install of the pre-release.