fzdwx

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

	package bench

	import (
	"github.com/bytedance/gopkg/util/gopool"
	"github.com/lesismal/nbio/taskpool"
	ants "github.com/panjf2000/ants/v2"
	"github.com/redis/go-redis/v9"
	"sync"
	"testing"
	)

	package main

	import (
	"fmt"
	"os"
	)

	func main() {

	c1 := make(chan int, 1)

	import java.util.concurrent.locks.LockSupport;

	public class test {

	public static void main(String[] args) {
	final Thread t6 = new Thread(new T(6, null));
	final Thread t5 = new Thread(new T(5, t6));
	final Thread t4 = new Thread(new T(4, t5));
	final Thread t3 = new Thread(new T(3, t4));
	final Thread t2 = new Thread(new T(2, t3));