refine performance test

Author: XenoAmess

src/test/java/org/apache/commons/lang3/StringUtilsStripTest.java

@@ -18,10 +18,13 @@
 
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
 import org.openjdk.jmh.annotations.Mode;
 import org.openjdk.jmh.annotations.OutputTimeUnit;
 import org.openjdk.jmh.annotations.Scope;
 import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
 import org.openjdk.jmh.infra.Blackhole;
 
 import java.util.concurrent.TimeUnit;
@@ -50,23 +53,16 @@ public class StringUtilsStripTest {
     static final String[] strings = buildStrings();
 
     private static String[] buildStrings() {
-        String[] res = new String[128 * 128 * 128 * 128];
+        String[] res = new String[128 * 128 * 128];
         for (int i = 0; i < 128; i++) {
             for (int j = 0; j < 128; j++) {
                 for (int k = 0; k < 128; k++) {
-                    for (int l = 0; l < 128; l++) {
-                        StringBuilder stringBuilder = new StringBuilder();
-                        stringBuilder.append((char) i);
-                        stringBuilder.append((char) j);
-                        stringBuilder.append((char) k);
-                        stringBuilder.append((char) l);
-
-                        res[128 * 128 * 128 * i
-                                + 128 * 128 * j
-                                + 128 * k
-                                + l
-                                ] = stringBuilder.toString();
-                    }
+                    StringBuilder stringBuilder = new StringBuilder();
+                    stringBuilder.append((char) i);
+                    stringBuilder.append((char) j);
+                    stringBuilder.append((char) k);
+
+                    res[128 * 128 * i + 128 * j + k] = stringBuilder.toString();
                 }
             }
         }