Быстрая аллокация памяти

const int MAX_MEM = 1e8;
int mpos = 0;
char mem[MAX_MEM];
inline void * operator new ( size_t n ) {
    char *res = mem + mpos; mpos += n;
    assert(mpos <= MAX_MEM);
    return (void *)res;
}
inline void operator delete ( void * ) { }