Comment: The reason (Score 1) 145
I don't have the bookmark here, but I followed the discussion ( I am on that mail list, and I am a huge fan of javascript ) is that with Lua, is possible to have "quotas". You can limit what LUA do in cpu and ram useage, while a javascript vm maybe will end stressing the server. This was the ultimate motive. This and that some features we easy to implement (where already implemented in the discussion). I think this mean that Javascript must add these things, and make easy for "language embeders" to control how much memory javascript take. I don't know how feasible is that.