BufferAllocBenchmarkpublic class BufferAllocBenchmark extends Object
| Methods Summary |
|---|
| public static long | doAlloc(int size, int count, boolean direct)
long start = System.currentTimeMillis();
for (int i = 0; i < count; i++) {
ByteBuffer buf;
if (direct) {
buf = ByteBuffer.allocateDirect (size * 1024);
} else {
buf = ByteBuffer.allocate (size * 1024);
}
}
return (System.currentTimeMillis() - start);
| | public static long[] | doLoop(int count, boolean direct)
long [] times = new long [count];
for (int i = 0; i < times.length; i++) {
times [i] = doAlloc (i * 8, 100, direct);
// System.gc();
}
return (times);
| | public static void | main(java.lang.String[] argv)
long [] nonDirect;
long [] direct;
System.out.println ("Pre-running");
doLoop (2, false);
doLoop (2, true);
System.gc();
System.out.println ("allocating non-direct buffers");
nonDirect = doLoop (25, false);
System.gc();
System.out.println ("allocating direct buffers");
direct = doLoop (25, true);
System.gc();
System.out.println ("done");
printResults (nonDirect, direct);
| | public static void | printResults(long[] nonDirect, long[] direct)
System.out.println ("Size\talloc\tallocDirect");
for (int i = 0; i < nonDirect.length; i++) {
System.out.println ("" + ((i + 1) * 8) + "\t"
+ nonDirect [i] + "\t" + direct [i]);
}
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