hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

JSchaenzle

#include <string.h>
#include <stdio.h>
#include <iostream>
#include <fstream>
#include <vector>
#include "rapidxml-1.13/rapidxml.hpp"

using namespace rapidxml;
using namespace std;

tracend

/****************************************************************************
 *
 *      DirectInput keyboard scan codes
 *
 ****************************************************************************/
#define DIK_ESCAPE          0x01
#define DIK_1               0x02
#define DIK_2               0x03
#define DIK_3               0x04
#define DIK_4               0x05