1 Jun
2005
1 Jun
'05
10:10 a.m.
That's a myth. Apart from copying elimination (small string optimization can be done in addition to COW for large strings), COW's msync is much more efficient (naked increments to begin with) than allocator's msync. Brain-dead implementations and "test harnesses" (gotw 45) don't really change the reality.
I have a little experience with multithreaded programming. All the more isn't COW deserve to be part of Boost? (I don't insist however :))