Added more comments on this bug (now marked as duplicate):
https://bugs.launchpad.net/unity/+bug/638328
It seems that the memory leak was not the source of all slowness and there is still some of it left (duplicate status is wrongly fixed).
Added more comments on this bug (now marked as duplicate):
https:/ /bugs.launchpad .net/unity/ +bug/638328
It seems that the memory leak was not the source of all slowness and there is still some of it left (duplicate status is wrongly fixed).