git_status_summary extremely slow for large repos

[pokowaka]

Large repos can turn the command prompt unresponsive for long stretches of time.

This is due to the fact that the call to

git status --porcelain -b

can take a large amount of time:

 time  git status --porcelain -b
--- some data --
real    4m1.149s
user    3m59.189s
sys     0m1.948s

This makes oh-my-bash unusable. The prompt should ideally not be delayed for more than 0.1s. See https://www.nngroup.com/articles/response-times-3-important-limits/

[ecnelises]

oh-my-zsh has a config item in git named oh-my-bash.hide-status. When this set to 1, shell prompt won't load git status. Can we add that?

[pokowaka]

@chaifeng, @ nntoan, @rpotter12 is anyone interested in merging this pull request?

[gdevenyi]

A slight adjustment to this, I'd like to be able to specify paths to exclude from git status, as some are mounted remotely and take a long time to run status.

[akinomyoga]

I think this issue is actually a duplicate of #6. @gdevenyi Thank you for the suggestion! It seems there is a related solution in oh-my-zsh at ohmyzsh/ohmyzsh#3009 (comment). I think we may utilize the settings for oh-my-zsh.

Another solution is to use romkatv/gitstatus which extracts the git information in the background. akinomyoga/ble.sh also implements the background extraction of the git information. Or we may implement it by ourselves.