prm can help you easy and fast switch between different npm registries,
now include: npm, cnpm, taobao, nj(nodejitsu), rednpm, yarn, npmMirror, edunpm.
npm i prm-cli -g# List all registries
prm ls# Select a registry that you need to switch
prm use taobao# Show response time for specific or all registries
prm test
# or
prm test [registry]sudo npm link

