I'm excited about sync.Pool:<p><a href="http://tip.golang.org/pkg/sync/#Pool" rel="nofollow">http://tip.golang.org/pkg/sync/#Pool</a><p>There are a lot of cases where people write their own version of this (myself included, but also the connections in database/sql for example). It will be great to have an implementation in the standard library. This technique has been very, very useful in StatHat's production code as we have grown.