Modified test_vvadd test to use RDTSC instead of get_time_usec
Modified test_vvadd test to use RDTSC instead of get_time_usec

NerdWalletOSS/Q,NerdWalletOSS/Q,NerdWalletOSS/Q,NerdWalletOSS/Q,NerdWalletOSS/Q,NerdWalletOSS/Q,NerdWalletOSS/Q,NerdWalletOSS/Q