Question

我试图在ExpressJS中对我的api进行压力测试，并处理多个请求，我先使用Promise.all，然后使用带有并发选项的Async.queue。

承诺：

export const myapi = async (args1, args2) => {
console.log('args:', args1, args2);

let testing_queue = [];
testing_queue.push(new Promise(async (resolve, reject) => {
        let result = await doAComplexQuery(args1, args2); // SELECT... JOIN...
        if (!result || result.length <= 0)
            reject(new Error('Cannot find anything!'));
        resolve(result);
    }
));
return await Bluebird.map(testing_queue, async item => {
    return item;
}, {concurrency: 4});    };

异步队列：（https://www.npmjs.com/package/async）

export const myapi = async (args1, args2) => {
console.log('args:', args1, args2);

let testing_queue = Async.queue(function (task, callback) {
    console.log('task', task);
    callback();
}, 4);
testing_queue.push(async function () {
        let result = await doAComplexQuery(args1, args2); // SELECT... JOIN...
        if (!result || result.length <= 0)
            throw new Error('Cannot find anything!');
        return result;
    }
);};

并尝试尽可能多地提出请求：

const response = async function () {
    return await Axios.post('http://localhost:3000/my-api', {
        "args1": "0a0759eb",
        "args2": "b9142db8"
    }, {}
    ).then(result => {
        return result.data;
    }).catch(error => {
        console.log(error.message);
    });
};

for (var i = 0; i < 10000; i++) {
    response();
}

然后运行。＃1方法返回许多ResourceTimeout或Socket挂断响应。同时，＃2返回所有请求的成功响应，并且运行速度甚至更快。

那么在这种情况下Async.queue更好吗？

Answer 1

如果您提高promise.map的并发限制，我认为这可以提高速度。

Async.queue和Promise.map有什么区别？

1 个答案: