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POAndroid Slow File Download vs iOS & BlackBerry - DefaultHttpClient
 

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  1. POAndroid Slow File Download vs iOS & BlackBerry - DefaultHttpClient
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    <p>I am using the following code to download files, and I am finding that the performance is really really slow compared with virtually the same code on iOS and BlackBerry.</p> <p>As well as testing on various different SDK versions and OSX vs Windows, I have also tried the App on various devices - HTC Desire, Samsung Galaxy, Huwei Pulse, HTC Wildfire - all with terrible performance vs. iPhone and BlackBerry devices.</p> <p>Check out this video I made to compare the speeds on the 3 emulators: <a href="http://mepubli.sh/iOSvsAndroidVsBB.mp4" rel="nofollow">Android vs. iOS and BlackBerry</a></p> <p>Here is the Android code:</p> <pre><code>FileOutputStream fos = null; InputStream input = null; try { fos = new FileOutputStream("XXXX"); HttpClient httpclient = new DefaultHttpClient(); HttpGet httpget = new HttpGet("XXXX"); HttpResponse response = httpclient.execute(httpget); input = response.getEntity().getContent(); byte[] buffer = new byte[8192]; int readBytes; while (((readBytes = input.read(buffer, 0, buffer.length)) != -1) &amp;&amp; !thePackage.getPackageStatus().equals( PackageStatus.STATUS_CANCEL_DOWNLOAD)) { fos.write(buffer, 0, readBytes); } } catch (IOException e) { e.printStackTrace(); } finally { if (fos != null) { try { fos.close(); } catch (IOException e) { } } if (input != null) { try { input.close(); } catch (IOException e) { } } } </code></pre> <p>I've tried BufferedHttpEntity and other buffering/threading strategies, but this version of the code is the best performing out of any of the different options we've tried. I've run extensive code profiling, and can't see too much time being lost between the top level functions and the native code in Dalvik/Apache Harmony.</p> <p>Any ideas would be fantastic, because the bad performance is making our application virtually unusable.</p> <p>Thanks,</p> <p>Nick</p>
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    1. USNick Grant
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      1. USOmar Rehman
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    1. CO..just a thought, 'cos I don't have any android. What is the typical readBytes value returned? I've been bitten by that sort of thing before on other apps/systems - allocate a big buffer, system read call insists on returning just a few bytes for each call resulting in inefficient buffer use and excessive disk writes.
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      1. USMartin James
    2. COOh - and can't see where buffer gets freed - does android have a GC?
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      1. USMartin James
    3. COHi Nick, I assume you're doing this in a service or a background thread?
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