初次接触node js 时，看到node js 异步io性能很高，并发很强，当时就认为很强，用了一段时间，，后来某天又看到以性能著称的golang，于是又学习了一波，，并对两者进行了性能对比，，果不其然，node js败下阵来。。后来对并发产生了浓厚兴趣，于是自己使用unix系统的api写了个tcp服务，来测试并发，然而水平有限，分别使用了单线程阻塞，多线程，io多路复用，，性能一个比一个差，，因为写的简单只返回hello world，也许性能差的原因和此有关，不同的情况适合不同的io模型，，以后会尝试io密集型，计算密集型测试，现在先将使用ab 工具测试的node js 服务，golang服务，单线程阻塞服务，recv多线程服务，mac下kqueue 服务的ab测试结果及测试的代码贴出来，供大家吐槽指点。
node js，1000请求100并发，平均每秒处理请求数量 12000左右
代码
let http = require("http");
http.createServer(function(req,res){
res.writeHead(200);
res.end("hello world");
}).listen(8003);
golang，1000请求100并发，平均每秒处理请求数量 14000左右
代码
package main
import(
"net/http"
)
func main(){
http.HandleFunc("/",func(w http.ResponseWriter,r*http.Request){
w.Write([]byte("hello world"))
})
http.ListenAndServe(":8020",nil)
}
单线程阻塞，1000请求100并发，平均每秒请求数量 8000左右
代码
#include <stdio.h>
#include <netdb.h>
#include <sys/socket.h>
char resdata[205] = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\nhello world";
int main(int argc, const char * argv[]) {
struct sockaddr_in bindaddr;
bindaddr.sin_family = AF_INET;
bindaddr.sin_addr.s_addr = htonl(INADDR_ANY);
bindaddr.sin_port = htons(3001);
int listenfd = socket(AF_INET, SOCK_STREAM, 0);
if(listenfd>0){
printf("创建socket成功");
if (bind(listenfd, (struct sockaddr *)&bindaddr, sizeof(bindaddr)) != -1){
printf("绑定端口号成功");
if (listen(listenfd, SOMAXCONN) != -1){
printf("初始化成功");
while (1) {
int clientfd = accept(listenfd, NULL, NULL);
char buf[200];
//5. 从客户端接受数据
int ret = recv(clientfd, buf, 200, 0);
if(ret >0){
int ret2 = send(clientfd, resdata, 200, 0);
if(ret2 > 0){
printf("发送数据成功");
close(clientfd);
}
else{
printf(ret2);
}
}
else{
printf("123");
}
}
}
}
};
}
多线程阻塞，1000请求100并发，平均每秒处理请求数量3000左右
代码（打印了许多文字来追踪流程勿喷)
#include <stdio.h>
#include <netdb.h>
#include <sys/socket.h>
#include <pthread.h>
pthread_t ntid;
char resdata[205] = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\nhello world";
void deal(int clientfd){
char buf[999];
//5. 从客户端接受数据
int ret = recv(clientfd, buf, 999, 0);
if(ret >0){
int ret2 = send(clientfd, resdata, strlen(resdata), 0);
if(ret2 > 0){
printf("发送数据成功");
close(clientfd);
}
else{
printf(ret2);
}
pthread_exit((void *)2);
}
}
int main(int argc, const char * argv[]) {
struct sockaddr_in bindaddr;
bindaddr.sin_family = AF_INET;
bindaddr.sin_addr.s_addr = htonl(INADDR_ANY);
bindaddr.sin_port = htons(3000);
int listenfd = socket(AF_INET, SOCK_STREAM, 0);
if(listenfd>0){
printf("创建socket成功");
if (bind(listenfd, (struct sockaddr *)&bindaddr, sizeof(bindaddr)) != -1){
printf("绑定端口号成功");
if (listen(listenfd, SOMAXCONN) != -1){
printf("初始化成功");
while (1) {
printf("第二轮循环开始");
int clientfd = accept(listenfd, NULL, NULL);
int err;
err = pthread_create(&ntid,NULL,deal,clientfd);
if(err == 0){
printf("一轮循环结束\n");
}
}
}
}
};
}
kqueue 多路复用（因为我是mac电脑）1000请求100并发大量socket 54 错误，可能代码有问题，，改为1000请求10并发，每秒处理3000左右请求
代码
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/event.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#define PORT 3000
#define MAX_EVENT_COUNT 100000
void dealwrite(int sock,int kq){
printf("写h数据");
char buffer[]="HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\nhello world";
ssize_t sendlen = send(sock, buffer, sizeof(buffer), 0);
printf("%d",sendlen);
printf("&");
printf("%d",sock);
if (sendlen <= 0)
{
//链接断开
close(sock);
struct kevent event = {sock,EVFILT_READ,EV_DELETE,0,0,NULL};
kevent(kq, &event, 1, NULL, 0, NULL);
printf("write broken!\n");
return;
}
//struct kevent event = {sock,EVFILT_READ,EV_DELETE,100,0,NULL};
//kevent(kq, &event, 1, NULL, 0, NULL);
//struct kevent event2 = {sock,EVFILT_WRITE,EV_DELETE,200,0,NULL};
//kevent(kq, &event2, 1, NULL, 0, NULL);
close(sock);
}
void dealread(int sock,int kq){
char buffer[100];
printf("读数据");
printf("%d",sock);
printf("&");
//memset(buffer, '\0', data);
ssize_t recvlen = recv(sock, buffer, 100, 0);
printf("%d",recvlen);
if(recvlen == 100){
return;
}
if (recvlen <= 0)
{
//链接断开
close(sock);
struct kevent event = {sock,EVFILT_READ,EV_DELETE,0,0,NULL};
kevent(kq, &event, 1, NULL, 0, NULL);
printf("read broken!\n");
return;
}
struct kevent changelist2[1];
EV_SET(&changelist2[0], sock, EVFILT_WRITE, EV_ADD, 0, 200, NULL);
kevent(kq, changelist2, 1, NULL, 0, NULL);
}
int createSocket()
{
int sock = socket(PF_INET, SOCK_STREAM, 0);
if (sock == -1)
{
printf("socket() failed:%d\n",errno);
return -1;
}
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(PORT);
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
int optval = 1;
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
optval = 1;
setsockopt(sock, SOL_SOCKET, SO_NOSIGPIPE, &optval, sizeof(optval));
if (bind(sock, (struct sockaddr*)&addr, sizeof(struct sockaddr)) == -1)
{
printf("bind() failed:%d\n",errno);
return -1;
}
if (listen(sock, 5) == -1)
{
printf("listen() failed:%d\n",errno);
return -1;
}
return sock;
}
int main(int argc, const char * argv[])
{
int listenfd = createSocket();
if (listenfd == -1)
return -1;
int kq = kqueue();
if (kq == -1)
{
printf("kqueue failed:%d",errno);
return -1;
}
struct kevent event = {listenfd,EVFILT_READ,EV_ADD,0,0,NULL};
int ret = kevent(kq, &event, 1, NULL, 0, NULL);
if (ret == -1)
{
printf("kevent failed:%d",errno);
return -1;
}
printf("%c",EVFILT_WRITE);
while (1)
{
struct kevent eventlist[MAX_EVENT_COUNT];
struct timespec timeout = {5,0};
int ret = kevent(kq, NULL, 0, eventlist, MAX_EVENT_COUNT, &timeout);
if (ret <= 0)
continue;
for (int i=0; i<ret; i++)
{
struct kevent event = eventlist[i];
int sock = (int)event.ident;
int16_t filter = event.filter;
uint32_t flags = event.flags;
intptr_t data = event.data;
printf("重新开始");
printf("%c",filter);
//有新的客户端链接
if (sock == listenfd)
{
printf("新链接");
printf("%d",sock);
socklen_t client_addrlen = 4;
struct sockaddr client_addrlist[client_addrlen];
int clientfd = accept(listenfd, client_addrlist, &client_addrlen);
if (clientfd > 0)
{
struct kevent changelist[1];
EV_SET(&changelist[0], clientfd, EVFILT_READ, EV_ADD, 0, 100, NULL);
kevent(kq, changelist, 1, NULL, 0, NULL);
kevent(kq, changelist, 1, NULL, 0, NULL);
}
continue;
}
//异常事件
if (flags & EV_ERROR)
{
printf("异常");
close(sock);
struct kevent event = {sock,EVFILT_READ,EV_DELETE,0,0,NULL};
kevent(kq, &event, 1, NULL, 0, NULL);
printf("socket broken,error:%ld\n",data);
continue;
}
//数据可读
if (filter == EVFILT_READ)
{
dealread(sock,kq);
}
//数据可写s
if (filter == EVFILT_WRITE)
{
dealwrite(sock,kq);
}
}
}
return 0;
}
如有kqueue错误使用之处请指出。
所有代码都在本机上运行通过，socket服务是用c语言写的，需要编译运行，kqueue需要在mac机上运行，golang需要安装对应环境及设置对应变量
如果要安装golang环境并对golang感兴趣可以给我留言，
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