Startup speed (on Windows)

[cjrh]

The vim-conda plugin takes way too long to load, 400-500 ms based on --startuptime timings. The subprocess calls are surely a big chunk, but we can be smarter in how the work gets done.

I'm also thinking it might be a good idea to have a continuously-running process for querying conda things, rather than starting up a subprocess each time.

[Mistobaan]

Also in Linux it takes a lot of time. Any clue why?

Top 10 plugins slowing vim's startup
====================================
1        31.292   vim-conda
2        25.968   nerdtree
3        17.585   vim-textobj-entire
4        12.444   syntastic
5        10.103   vim-fugitive
6         6.218   vim-airline
7         4.610   vim-unimpaired
8         4.101   vim-gitgutter
9         2.280   python-mode
10        1.260   vim-test
====================================

[cjrh]

Yes, it's because of os calls to look up things in the environment and e.g. run conda info commands and parse the output. It should be fairly easy to optimize, but I have no time for it.

[ryanfreckleton]

I've got a branch that reduces this startup time to about a third of what it is by using a memoize decorator. The big culprit is running conda info --json, which is needed for default_prefix and envs.

I believe that you can get default_prefix and envs by looking at the output of which python instead of asking conda directly, but haven't had a chance to mess with it entirely.

Please advise on whether there's interest in using the memoize solution, or if I should just open a pull request once I have it working with shell tools.

[jfishe]

I haven't played with memoize, but the idea is appealing. I'd be happy to test it for you. I use Windows mostly with some WSL Ubuntu; currently using a link from .vim to my vimfiles, so far without problems.

BTW, on Windows which is spelled where.

[ryanfreckleton]

Sorry it took me a while to get back to this: I've got a fork at https://github.com/ryanfreckleton/vim-conda/tree/develop which has the modifications to use a caching system which gives quite good speedup.

Please advise whether there's enough interest for me to put together a pull request.

[cjrh]

@ryanfreckleton Sure! I've added you as a collaborator so you have commit rights. You'll prob want to put up a PR anyway to get feedback from the others.

[ryanfreckleton]

Awesome, thanks! I will :)

[ryanfreckleton]

Pull-request open at #24 I'd like at least one other person to look at it and someone to test it on windows before I merge.

[ryanfreckleton]

Merged. Could someone on windows please test to see if performance increases?

[jfishe]

I see a vim-conda.vim load time improvement from 1554 msec to 781 msec on Windows 10 for conda v4.5.1.

Good job.