There's a branch of node, vee-eight-lkgr, running the new v8 5.8 compiler chain. You can read about how to try it out (and help test it) here: https://medium.com/@bmeurer/help-us-test-the-future-of-node-...

Since 16 days ago master uses 5.6, whereas v8 is at 5.8, the pull request took about a month to go through, but it touched ~2000 files, and there doesn't appear to be an open pull request for "update v8". So it seems it'll take some time (as it looks like a considerable effort).

And current 5.7 issues seem to live here: https://github.com/nodejs/v8/issues

https://github.com/nodejs/node/commit/7a77daf24344db7942e34c...

https://github.com/v8/v8/releases

I think they're aiming to ship v8 5.8 with Node 8 in April.