fix: benchmark by mixing in more characters that need encoding

Author: jeremylong

src/test/java/com/github/packageurl/internal/StringUtilBenchmark.java

@@ -56,8 +56,10 @@ public class StringUtilBenchmark {
 
     private static final int DATA_COUNT = 1000;
     private static final int DECODED_LENGTH = 256;
-    private static final byte[] UNRESERVED =
-            "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~".getBytes(StandardCharsets.US_ASCII);
+    private static final char[] UNRESERVED =
+            "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~".toCharArray();
+    private static final char[] RESERVED = " ?&=+%#@!*()[]{}|\\:;,/<>'\"".toCharArray();
+
 
     @Param({"0", "0.1", "0.5"})
     private double nonAsciiProb;
@@ -71,10 +73,13 @@ private String[] createDecodedData() {
         for (int i = 0; i < DATA_COUNT; i++) {
             char[] chars = new char[DECODED_LENGTH];
             for (int j = 0; j < DECODED_LENGTH; j++) {
-                if (random.nextDouble() < nonAsciiProb) {
+                double r = random.nextDouble();
+                if (r < nonAsciiProb) {
                     chars[j] = (char) (Byte.MAX_VALUE + 1 + random.nextInt(Short.MAX_VALUE - Byte.MAX_VALUE - 1));
+                } else if (r < nonAsciiProb + 0.2) {
+                    chars[j] = RESERVED[random.nextInt(RESERVED.length)];
                 } else {
-                    chars[j] = (char) UNRESERVED[random.nextInt(UNRESERVED.length)];
+                    chars[j] = UNRESERVED[random.nextInt(UNRESERVED.length)];
                 }
             }
             decodedData[i] = new String(chars);