Gulp babel es2015 transform very slow

Question

I am trying to run the babel-preset-es2015 on my JavaScript using gulp, but it takes forever even on one line of code. I originally tried with my script bundle that is about 700

Answer 1

Babel 6 has many highly-nested subdependencies. This can be quite slow if you have a non-flattened dependency tree. In your case, you are using npm 2, you will need to either npm dedupe or install npm@3 and reinstall so that your dependencies are flattened.