Droid vs Nexus 1: Who can calculate MD5 faster?
Nexus 1 indeed.
17 files get their MD5 calculated on the Droid
and 17 files get their MD5 hash calculated on the Nexus 1
Nexus 1 pwns.
Here’s the code in case you’re curious.
public void onClick(View v) {
_logTextView.setText("MD5 Benchmark on " + Build.DEVICE + "nn");
if (GlobalVariables.APP_CONTEXT == null)
GlobalVariables.APP_CONTEXT = getApplicationContext();
List<FileDescriptor> sharedAudioFiles = Engine.INSTANCE.LIBRARIAN.getSharedAudioFiles(0, 17);
for (FileDescriptor fs: sharedAudioFiles) {
long start = 0;
String md5 = null;
long length = 0;
try {
start = System.currentTimeMillis();
File f = new File(fs.path);
length = f.length();
md5 = FrostWireUtils.getMD5(f);
} catch (Exception e) { }
long time = System.currentTimeMillis() - start;
_logTextView.append(FrostWireUtils.getBytesInHuman(length) + " in " + time + " ms @ " + (length/(double) time)*1000 + " b/sn");
}
}
And here’s how we do the MD5
public final static String getMD5(File f) throws Exception {
MessageDigest m = MessageDigest.getInstance("MD5");
byte[] buf = new byte[65536];
int num_read;
InputStream in = new BufferedInputStream(new FileInputStream(f));
while ((num_read = in.read(buf)) != -1) {
m.update(buf, 0, num_read);
}
String result = new BigInteger(1, m.digest()).toString(16);
// pad with zeros if until it's 32 chars long.
if (result.length() < 32) {
StringBuffer padding = new StringBuffer();
int paddingSize = 32 - result.length();
for (int i = 0; i < paddingSize; i++)
padding.append("0");
result = padding.toString() + result;
}
return result;
}
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May 23rd, 2010 at 10:49 am
test