PeepOpen window slow to open

[elben]

Setting the line below in my .vimrc slows down opening PeepOpen by a lot (~1 seconds), to the point of annoyance.

set shell=zsh\ -i

I set the shell so that MacVim loads my zsh paths (e.g. the right version of rails). It's not strictly necessary for me, so I simply reverted my .vimrc.

PeepOpen 0.3.6.