It's a problem with writing asynchronous code when you have lots of consecutive requests. I don't know if node has something like this but the Tornado team have

It's a problem with writing asynchronous code when you have lots of consecutive requests. I don't know if node has something like this but the Tornado team have written http://www.tornadoweb.org/documentation/gen.html http://www.tornadoweb.org/documentation/gen.html which can make such things a little easier