itoa speed test

itoa.cpp

#include <cstdlib>
#include <sstream>

int main(int argc, char **argv)
{
	std::string s;
	clock_t start, end;
	char buf[10];

	for (int j = 0; j < 2; j++) {
		start = clock();
		for (int i = 0; i < 1000000; i++) {
			s = static_cast<std::ostringstream*>( &(std::ostringstream() << i ) )->str();
		}
		end = clock();
		printf("ostringstream: %fms\n", ((double)(end - start) * 1000) / CLOCKS_PER_SEC);

		start = clock();
		for (int i = 0; i < 1000000; i++) {
			sprintf(buf, "%d", i);
		}
		end = clock();
		printf("sprintf: %fms\n", ((double)(end - start) * 1000) / CLOCKS_PER_SEC);
	}

	return 0;
}