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copied!<p>The CPU is indeed slower on SPARC (1.2Ghz) and as answered by one of the Sun's engineers T2 is usualy 3 times slower for single-threaded application than modern Intel processors. Though, he also stated that in a multi-threaded environment SPARC should be faster.</p> <p>I have made a multi-threaded test using GroboUtils library and tested both allocations (through concatenations) and simple calculations ( a += j*j ) to test processor. And I've got the following results:</p> <pre><code>1 thread : Intel : Calculations test : 43ms 100 threads : Intel : Calculations test : 225ms 1 thread : Intel : Allocations test : 35ms 100 threads : Intel : Allocations test : 1754ms 1 thread : SPARC : Calculations test : 197ms 100 threads : SPARC : Calculations test : 261ms 1 thread : SPARC : Allocations test : 236ms 100 threads : SPARC : Allocations test : 1517ms </code></pre> <p>SPARC shows its power here by outperforming Intel on 100 threads.</p> <p>Here goes the multi-threaded calculation test:</p> <pre><code>import java.util.ArrayList; import java.util.List; import net.sourceforge.groboutils.junit.v1.MultiThreadedTestRunner; import net.sourceforge.groboutils.junit.v1.TestRunnable; import junit.framework.TestCase; public class TM1_CalculationSpeedTest extends TestCase { public void testCalculation() throws Throwable { List threads = new ArrayList(); for (int i = 0; i < 100; i++) { threads.add(new Requester()); } MultiThreadedTestRunner mttr = new MultiThreadedTestRunner((TestRunnable[]) threads.toArray(new TestRunnable[threads.size()])); mttr.runTestRunnables(2 * 60 * 1000); } public class Requester extends TestRunnable { public void runTest() throws Exception { long startTime = System.currentTimeMillis(); long a = 0; for (int j = 0; j < 10000000; j++) { a += j * j; } long endTime = System.currentTimeMillis(); System.out.println(this + ": " + (endTime - startTime) + "ms " + a); } } } </code></pre> <p>Here goes the multi-threaded allocation test:</p> <pre><code>import java.util.ArrayList; import java.util.List; import junit.framework.TestCase; import net.sourceforge.groboutils.junit.v1.MultiThreadedTestRunner; import net.sourceforge.groboutils.junit.v1.TestRunnable; public class TM2_AllocationSpeedTest extends TestCase { public void testAllocation() throws Throwable { List threads = new ArrayList(); for (int i = 0; i < 100; i++) { threads.add(new Requester()); } MultiThreadedTestRunner mttr = new MultiThreadedTestRunner((TestRunnable[]) threads.toArray(new TestRunnable[threads.size()])); mttr.runTestRunnables(2 * 60 * 1000); } public class Requester extends TestRunnable { public void runTest() throws Exception { long startTime = System.currentTimeMillis(); String a = "dummy"; for (int j = 0; j < 1000; j++) { a += "allocation driven"; } long endTime = System.currentTimeMillis(); System.out.println(this + ": " + (endTime - startTime) + "ms " + a.length()); } } } </code></pre>

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