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POJavamail performance
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copied!<p>I've been using javamail to retrieve mails from IMAP server (currently GMail). Javamail retrieves list of messages (only ids) in a particular folder from server very fast, but when I actually fetch message (only envelop not even contents) it takes around 1 to 2 seconds for each message. What are the techniques should be used for fast retrieval?</p> <p>here is my code:</p> <pre><code> try { IMAPStore store = null; if(store!=null&&store.isConnected())return; Properties props = System.getProperties(); Session sessionIMAP = Session.getInstance(props, null); try { store = (IMAPStore) sessionIMAP.getStore("imaps"); store.connect("imap.gmail.com",993,"username@gmail.com","password"); } catch (Exception e) { e.printStackTrace(); } IMAPFolder folder = (IMAPFolder) store.getFolder("INBOX"); folder.open(Folder.READ_ONLY); System.out.println("start"); Message[] msgs = folder.getMessages(1,10); long ftime = System.currentTimeMillis(); FetchProfile fp=new FetchProfile(); fp.add(FetchProfile.Item.ENVELOPE); folder.fetch(msgs, fp); long time = System.currentTimeMillis(); System.out.println("fetch: "+(time-ftime)); for (Message message : msgs) { System.out.println(message.getSubject()); Address[] from = message.getFrom(); for (Address address : from) { System.out.println(address); } Address[] recipients = message.getAllRecipients(); for (Address address : recipients) { System.out.println(address); } } long newTime = System.currentTimeMillis(); System.out.println("convert: "+(newTime-time)); }catch (Exception e) { e.printStackTrace(); } } </code></pre>

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