Re: [Boost-users] [pool] Speed of pool_allocator<>

Klaus Nowikow wrote:

Hi!

I am in the process of writing a program which has to handle large numbers (~200000 - 400000) objects of the same class. These objects will be created and deleted frequently, so I thought some kind of specialized memory management would be handy.

I wrote a test program (see below) to check what boost.pool would gain me. The results make me think that I have done something wrong:

debug mode: std::allocator 2.17s boost::pool_allocator 7.18s

release mode: std::allocator 0.11s boost::pool_allocator 0.36s

i.e., std::allocator was more than 3 times faster than boost::pool_allocator (Win2k, 256MB). Any ideas what i have done wrong?

[...]

template <class Allocator> double Test() { std::vector Vector; boost::timer Timer;

for(int i = 0; i < NUM_ELEMENTS; ++i) { Vector.push_back(i); }

return Timer.elapsed(); }

If I read the code correctly, you don't create or delete objects. You create and delete (large) arrays of objects.