kenix

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.util.Arrays;
import java.util.Iterator;
import java.util.stream.IntStream;

kenix

import java.util.stream.IntStream;

/**
 * jdk1.8.0_31
 * machdep.cpu.brand_string: Intel(R) Core(TM) i5-4278U CPU @ 2.60GHz
 * machdep.cpu.cache.size: 256
 * machdep.cpu.core_count: 2
 * machdep.cpu.thread_count: 4
 * <p>
 * Quote from https://software.intel.com/de-de/forums/software-tuning-performance-optimization-platform-monitoring/topic/278254"

kenix

Latency Comparison Numbers
--------------------------
L1 cache reference                            0.5 ns
Branch mispredict                             5   ns
L2 cache reference                            7   ns             14x L1 cache
Mutex lock/unlock                            25   ns
Main memory reference                       100   ns             20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy              3,000   ns
Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
Read 4K randomly from SSD*              150,000   ns    0.15 ms