Day 1 Day 2 Day 3 plenv rehash slowness I’ve been constantly annoyed by the slowness of plenv rehash. The rehash command is automatically called after every run of cpanm if you install it through plenv, and it could get slower if you have 20+ perl versions managed by plenv. I debugged this with PLENV_DEBUG=1 option a little bit and found out what’s slow is bash function call. I’ve made some of the