I am facing pretty long build times on development mode, around 50-70 seconds.

I could narrow it down to notice that babel-register and babel-polyfill being required takes way too long to execute even a console statement at the start of server.js file. Any suggestions to speed up this process ? Also, i have replaced cssnext with a less loader along with post-css, but i'm guessing that shouldn't be the cause for the performance hit at server side transpiling since i have fewer .less files.

P.S. I am running npm@3.9.6,, was thinking may be it was related to this post, but doesn't help.