On Thu, 2007-02-08 at 16:55 +0800, allen huang wrote: > Thank you Oleg, your tip is useful for me. So do you have good idea to how > to measure the difference between persistence connection and non-persistence > connection? Actually one of my desination in this testing is, how more fast > when use persistence connection than non-. >
Allen, If you are familiar with Apache Benchmark [1], you can use similar tool based on HttpClient [2]. Both tools can optionally enable / disable connection persistence. Hope this helps Oleg [1] http://httpd.apache.org/docs/2.0/programs/ab.html [2] http://svn.apache.org/repos/asf/jakarta/commons/proper/httpclient/trunk/src/contrib/org/apache/commons/httpclient/contrib/benchmark/ > On 2/7/07, Oleg Kalnichevski <[EMAIL PROTECTED]> wrote: > > > > On Wed, 2007-02-07 at 09:06 +0800, allen huang wrote: > > > 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 > > > > > > > Allen > > > > Essentially you are measuring the speed of JIT compiler, DNS hostname > > lookup, and that of the link to your ISP. I suspect this measurement > > does reflect the performance of the underlying HTTP engines at all. > > > > Please consider running your tests against an HTTP server on the local > > network, making a significant number of repetitions to eliminate data > > distortions due to JVM startup, JIT compilation and other factors > > > > You might want to use this benchmarking tool to test performance of > > HttpClient [1]. The HttpClient benchmark tool supports a subset of > > commands of the Apache Benchmark (ab) and produces similar output. > > > > Hope this helps > > > > Oleg > > > > [1] > > > > http://svn.apache.org/repos/asf/jakarta/commons/proper/httpclient/trunk/src/contrib/org/apache/commons/httpclient/contrib/benchmark/ > > > > > ----------------------------------------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) { > > > } > > > } > > > } > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
