I hadn't heard of this! It definitely helps with startup time. $ time hg help > /dev/null real 0m0.232s user 0m0.196s sys 0m0.033s $ time

I hadn't heard of this! It definitely helps with startup time. $ time hg help > /dev/null real 0m0.232s user 0m0.196s sys 0m0.033s $ time chg help > /dev/null real 0m0.081s user 0m0.003s sys 0m0.000s But because an empty `hg diff` takes 1.3s for me, taking 150ms off the top isn't a big help. $ time hg diff real 0m1.383s user 0m0.558s sys 0m0.333s $ time chg diff real 0m1.224s user 0m0.003s sys 0m0.007s