add generic speed test

darcs-hash:20040527023643-24bed-eecd569d8976993548d9e26527b54c58f0b098b1.gz

diff --git a/src/tests/GenericSpeedTest.java b/src/tests/GenericSpeedTest.java
new file mode 100644 (file)
index 0000000..a527f1e
--- /dev/null
+++ b/src/tests/GenericSpeedTest.java
@@ -0,0 +1,46 @@
+package tests;
+
+import java.lang.reflect.*;
+
+class GenericSpeedTest {
+    private static long start,end;
+    private static long now() { return System.currentTimeMillis(); }
+    private static void start()  { start = now(); }
+    private static void end() { end = now(); }
+    private static float diff() { return ((float)(end-start))/1000; }
+    
+    public static void main(String[] args) throws Exception {
+        float d;
+        
+        if(args.length < 2) { System.err.println("Usage: GenericSpeedTest runs classname args"); System.exit(1); }
+        int runs = Integer.parseInt(args[0]);
+        String className = args[1];
+        if(runs < 5) throw new Error("Runs must be >= 5");
+        String[] appArgs = new String[args.length-2];
+        for(int i=2;i<args.length;i++) appArgs[i-2] = args[i];
+        
+        Class c = Class.forName(className);
+        Method m = c.getMethod("main",new Class[]{Class.forName("[Ljava.lang.String;")});
+        
+        float times[] = new float[runs];
+        Object[] mainArgs = new Object[] { appArgs };
+        for(int i=0;i<runs;i++) {
+            System.gc();
+            start();
+            m.invoke(null,mainArgs);
+            end();
+            times[i] = diff();
+            System.err.println("Run " + (i+1) + ": " + times[i] + " sec");
+        }
+        
+        java.util.Arrays.sort(times);
+        
+        System.out.println("Best: " + times[0]);
+        System.out.println("Worst: " + times[times.length-1]);
+        float sum = 0.0f;
+        for(int i=2;i<times.length-2;i++)
+            sum += times[i];
+        float avg = sum / (times.length-4);
+        System.out.println("Avg of middle " + (times.length-4) + ": " + avg);
+    }
+}