jboner/akka — comment on commit 97811a7fa41a291f48e146158e1930b58e188602
File: akka-actor/src/main/scala/akka/dispatch/Future.scala line 200
By derekjw:

You would probably get better performance by doing something like this:

```scala
(Promise.success(zero) /: futures)((fr, fa) ⇒ for (r ← fr; a ← fa) yield (foldFun(r, a))
```