WIP - Babel 6 upgrade

[jamestalmage]

This works but Babel is really slow.

Also, I think there are some problems with the latest babel-plugin-transform-runtime that required me to pin back a minor release.

babel/babel#2954

[jamestalmage]

@floatdrop I think the reason I need to depend on babel-runtime@5 here is because of the way we are mucking with module paths. Many of babels transforms depend on babel-runtime@5 internally, so I think our hack is forcing unintentionally pushing them back to v6.

That's my best guess right now anyways.

[jamestalmage]

the reason I need to depend on babel-runtime@5 here is because of the way we are mucking with module paths

This may not be true. I just discovered that running the babel test suite had created a whole bunch of global symlinks. Not sure if it was what was causing this, I will retest later.

[jamestalmage]

Babel 6 has crazy long bootup.
#148 and #182 are going to become really important.

[sindresorhus]

Babel 6 has crazy long bootup.

Oh, that sucks... You might want to open an issue on Babel about it. You can use time-require to see what's slowing it down.

[jamestalmage]

~850ms: https://github.com/jamestalmage/__time-require-babel-5

~3.6 seconds: https://github.com/jamestalmage/__time-require-babel-6

[jamestalmage]

Never Mind:

npm dedupe improves babel 6 times drastically.

I still had npm@2 lying around in my node 4.1.2 install

So it seems you trade a longer npm install, for faster requires. Worth it, it seems to me.

[sindresorhus]

Cool, I guess it's fine then :)