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From "allen huang" <coolallenhu...@gmail.com>
Subject Re: [httpclient_common]_why httpclient's speed is the same with JDK httpurlconnection
Date Thu, 08 Feb 2007 08:49:33 GMT
Agree with you. But I think httpclient's target is not only this. Httpclient
has a connection pool to keep the links with the remote http server, and
httpurlconnection download a page with re-opening the connection each time,
why their speeds are not different?

On 2/8/07, maomaode <maomaode@gmail.com> wrote:
>
> I think the HttpClient essentially use the urlconnection, then i would
> ask why httpclient will faster than urlconnection?
> I think the benefit of HttpClient is that it manage the connection, that
> make your code more neat, you can focus on the business logic...
> > Hi,
> > I have a problem when trying to comparing the speed between JDK
> > HttpURLConnection and HttpClient.
> >
> > Now I have two methods, one is performed with jdk(1.5)
> httpurlConnection,
> > the other is performed with httpClient( 3.0.1). Both of them try to
> > download
> > the same
> > webpage(http://jakarta.apache.org).After<
> http://jakarta.apache.org%29.After>testing,
> >
> > the average time which performed JDK httpurlconnection  is  200ms,
> > so as the one which performed httpclient.That means their speeds are
> > almost
> > the same.
> >
> > So, since HttpClient use persistence connection default but JDK do
> > not, why
> > httpClient's speed could not be more fast than JDK?
> >
> > Another problem is, is it normal to httpclient to use 200ms to download
> a
> > page like http://jakarta.apache.org? I mean, when using persistence
> > connection, maybe this could not be accepted.
> >
> > Any help will be great appreciated
> >
> > ----------------------------------------Source to httpclient
> > method-------------------------------------
> >    public void testGetMethod(){
> >
> >        MultiThreadedHttpConnectionManager manager=new
> > MultiThreadedHttpConnectionManager();
> >        manager.getParams().setConnectionTimeout(3000);
> >        manager.getParams ().setDefaultMaxConnectionsPerHost(1);
> > //        manager.getParams().setMaxTotalConnections(30);
> >        HttpClient httpClient = new HttpClient(manager);
> >        // Set the default host/protocol for the methods to connect to.
> >        // This value will only be used if the methods are not given an
> > absolute URI
> > //        httpClient.getHostConfiguration().setProxy("192.168.0.10",80);
> > //        httpClient.getHostConfiguration().setHost("jakarta.apache.org
> ",
> > 80, "http");
> >        GetMethod method = new GetMethod(" http://jakarta.apache.org");
> >        for (int i=0;i<10;i++){
> >        try {
> >
> > //            System.out.println(" - about to get something from " +
> > method.getURI());
> >            // execute the method
> >            long start=System.currentTimeMillis();
> >            httpClient.executeMethod(method);
> >
> > //            System.out.println(" - get executed");
> >            // get the response body as an array of bytes
> >            byte[] bytes = method.getResponseBody();
> >            System.out.println("cost time is "+(System.currentTimeMillis
> > ()-start));
> >
> > //            System.out.println(new String(bytes));
> > //            System.out.println(" - " + bytes.length + " bytes read");
> >
> >        } catch (Exception e) {
> >            System.out.println(" - error: " + e);
> >        } finally {
> >            // always release the connection after we're done
> >            method.releaseConnection();
> > //            System.out.println(" - connection released");
> >        }
> >        }
> >    }
> > ------------------------------------------source code to JDK
> > httpurlconnection------------------------------------------------
> >    public void testJDKHttpURlconnection() {
> >
> >        for (int i = 0; i < 10; i++) {
> >            try {
> >                long start = System.currentTimeMillis();
> >                URL requestedURL = new URL("http://jakarta.apache.org");
> >                HttpURLConnection conn = (HttpURLConnection) requestedURL
> >                        .openConnection();
> >
> >                conn.setRequestProperty("User-Agent",
> >                        "Mozilla/4.0 (compatible; MSIE 5.5; Windows NT
> 5.0
> > )");
> >
> >                conn.setUseCaches(false);
> >
> >                conn.connect();
> >
> >                BufferedInputStream remoteBIS = new
> > BufferedInputStream(conn
> >                        .getInputStream());
> >                ByteArrayOutputStream baos = new
> > ByteArrayOutputStream(10240);
> >                byte[] buf = new byte[1024];
> >                int bytesRead = 0;
> >                while (bytesRead >= 0) {
> >                    baos.write(buf, 0, bytesRead);
> >                    bytesRead = remoteBIS.read(buf);
> >                }
> >                byte[] content = baos.toByteArray();
> >                System.out.println("cost time is "
> >                        + (System.currentTimeMillis() - start));
> >
> >            } catch (Exception e) {
> >            }
> >        }
> >    }
> >
>
>
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