How do I force my std::map to deallocate memory used?
- by monkeyking
I'm using a std::map, and I can't seem to free the memory back to the OS. It looks like,
int main(){
aMap m;
while(keepGoing){
while(fillUpMap){
//populate m
}
doWhatIwantWithMap(m);
m.clear();
//flush some buffered values into map for next iteration
flushIntoMap(m);
}
}
Each (fillUpmap) allocates around 1gig, so I'm very much interested in getting this back to my system before it eats up all my memory.
Ive experienced the same with std::vector, but there I could force it to free by doing a swap with an empty std::vector. This doesn't work with map.
When I use valgrind it says that all memory is freed, so its not a problem with a leak, since everything is cleared up nicely after a run.
