tornado 异步模型学习和压测总结

来源：互联网发布：梦里花落知多少抄袭编辑：程序博客网时间：2024/05/14 07:38

压测工具、文档、代码请参考 https://github.com/robertzhai/python/tree/master/tornado-basic

1.异步下载天气信息，@tornado.web.asynchonous装饰器

#rate_async.py

class IndexHandler(tornado.web.RequestHandler):    @tornado.web.asynchronous    def get(self):        client = tornado.httpclient.AsyncHTTPClient()        client.fetch("http://www.weather.com.cn/data/sk/101010100.html" ,                callback=self.on_response)    def on_response(self, response):        body = json.loads(response.body)        print body        result_count = len(body['weatherinfo'])        self.write(body['weatherinfo']['city'])        self.finish(）

2.异步下载天气信息，tornado.gen模块

class IndexHandler(tornado.web.RequestHandler):    @tornado.web.asynchronous    @tornado.gen.engine    def get(self):        client = tornado.httpclient.AsyncHTTPClient()        response = yield tornado.gen.Task(client.fetch,                "http://www.weather.com.cn/data/sk/101010100.html" )        body = json.loads(response.body)        print body        result_count = len(body['weatherinfo'])        self.write(body['weatherinfo']['city'])        self.finish()

3. sync 下载天气

class IndexHandler(tornado.web.RequestHandler):    def get(self):        client = tornado.httpclient.HTTPClient()        response = client.fetch("http://www.weather.com.cn/data/sk/101010100.html" )        body = json.loads(response.body)        print body        result_count = len(body['weatherinfo'])        self.write(body['weatherinfo']['city'])        self.finish()

4.压测对比

压测命令：siege http://localhost:8000/ -c50 -t10s

压测结果：async 性能最高

sync
Transactions: 274 hits
Availability: 100.00 %
Elapsed time: 9.94 secs
Data transferred: 0.00 MB
Response time: 1.13 secs
Transaction rate: 27.57 trans/sec
Throughput: 0.00 MB/sec
Concurrency: 31.19
Successful transactions: 274
Failed transactions: 0
Longest transaction: 1.69
Shortest transaction: 0.05

async

Transactions: 857 hits
Availability: 100.00 %
Elapsed time: 9.74 secs
Data transferred: 0.00 MB
Response time: 0.07 secs
Transaction rate: 87.99 trans/sec
Throughput: 0.00 MB/sec
Concurrency: 5.78
Successful transactions: 857
Failed transactions: 0
Longest transaction: 1.23
Shortest transaction: 0.02

gen

Transactions: 780 hits
Availability: 100.00 %
Elapsed time: 9.59 secs
Data transferred: 0.00 MB
Response time: 0.07 secs
Transaction rate: 81.33 trans/sec
Throughput: 0.00 MB/sec
Concurrency: 5.79
Successful transactions: 780
Failed transactions: 0
Longest transaction: 1.17
Shortest transaction: 0.01

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