diff --git a/benchmarks/src/benchmarks/regression/IcuBenchmark.java b/benchmarks/src/benchmarks/regression/IcuBenchmark.java
index 2aed36b..36014f2 100644
--- a/benchmarks/src/benchmarks/regression/IcuBenchmark.java
+++ b/benchmarks/src/benchmarks/regression/IcuBenchmark.java
@@ -19,14 +19,68 @@
 import com.google.caliper.SimpleBenchmark;
 
 import java.util.Locale;
-import java.util.TimeZone;
 
 import libcore.icu.ICU;
 
 public class IcuBenchmark extends SimpleBenchmark {
-  public void time_getBestDateTimePattern(int reps) throws Exception {
-    for (int rep = 0; rep < reps; ++rep) {
-      ICU.getBestDateTimePattern("dEEEMMM", new Locale("en", "US"));
+
+    private static final String ASCII_LOWERCASE = makeUnicodeRange(97, 122);
+    private static final String ASCII_UPPERCASE = makeUnicodeRange(65, 90);
+
+    private static final String LAT_1_SUPPLEMENT = makeUnicodeRange(0xC0, 0xFF);
+    private static final String LAT_EXTENDED_A = makeUnicodeRange(0x100, 0x17F);
+    private static final String LAT_EXTENDED_B = makeUnicodeRange(0x180, 0x24F);
+
+    private static final Locale CZECH_LOCALE = Locale.forLanguageTag("cs-CZ");
+    private static final Locale PINYIN_LOCALE = Locale.forLanguageTag("zh-Latn");
+
+    public static String makeUnicodeRange(int startingCodePoint, int endingCodePoint) {
+        char[] tmp = new char[endingCodePoint - startingCodePoint + 1];
+        for (int i = startingCodePoint; i <= endingCodePoint; i++) {
+            tmp[i - startingCodePoint] = (char) i;
+        }
+        return new String(tmp);
     }
-  }
+
+    public void time_getBestDateTimePattern(int reps) throws Exception {
+        for (int rep = 0; rep < reps; ++rep) {
+            ICU.getBestDateTimePattern("dEEEMMM", new Locale("en", "US"));
+        }
+    }
+
+    // Convert standard lowercase ASCII characters to uppercase using ICU4C in the US locale.
+    public void time_toUpperCaseAsciiUS(int reps) {
+        for (int i = 0; i < reps; i++) {
+            ICU.toUpperCase(ASCII_LOWERCASE, Locale.US);
+        }
+    }
+
+    // Convert standard uppercase ASCII characters to lowercase.
+    public void time_toLowerCaseAsciiUs(int reps) {
+        for (int i = 0; i < reps; i++) {
+            ICU.toLowerCase(ASCII_UPPERCASE, Locale.US);
+        }
+    }
+
+    // Convert Latin 1 supplement characters to uppercase in France locale.
+    public void time_toUpperCaseLat1SuplFr(int reps) {
+        for (int i = 0; i < reps; i++) {
+            ICU.toUpperCase(LAT_1_SUPPLEMENT, Locale.FRANCE);
+        }
+    }
+
+    // Convert Latin Extension A characters to uppercase in Czech locale
+    public void time_toUpperCaseLatExtACz(int reps) {
+        for (int i = 0; i < reps; i++) {
+            ICU.toUpperCase(LAT_EXTENDED_A, CZECH_LOCALE);
+        }
+    }
+
+    // Convert Latin Extension B characters to uppercase in Pinyin locale.
+    public void time_toUpperCaseLatExtBPinyin(int reps) {
+        for (int i = 0; i < reps; i++) {
+            ICU.toUpperCase(LAT_EXTENDED_B, PINYIN_LOCALE);
+        }
+    }
+
 }