async/await is still slower in 8.10 than promises though, isn't it?

Also, I'd be interested to find out why this is so massive? We've been waiting a long time for this, and I get that Lambda is complex with lambda@edge and all that, but how much tweaking does AWS do to the node runtime before they can deploy this?

Node 8 has been out for 10 months, and it's been LTS for half a year - or did they simply wait for it to be stable enough to run, or anything specific in 8.10?