[erlang-questions] Closures vs apply

[Ben Hood]

>  From the Efficiency Guide
> http://www.erlang.org/doc/efficiency_guide/functions.html#3.2 :
> fun calls are about 3 times less expensive than apply(M,F,A)

Interesting. Are there any descriptions or explainations about the
internals of function invocation that explain where these differences
arise from?

Thx,

Ben