Performance improvement regarding the iterators in libember

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We experienced performance problems with libember and therefore changed passing 
most of the iterator no longer by value, but by const-reference. This gives a 
boost about 10%-25% in our scenario. The reason, i think, is basically that a 
type-erased iterator is used, which needs dynamically allocated memory.

Please let me know your opinions about this issue - i will soon apply the patch 
if nobody disagree.

Original issue reported on code.google.com by nullable...@gmail.com on 25 Nov 2013 at 10:19

Attachments:

• iterator_by_cref.patch