优化IndexedComparator性能

hutool-core/src/test/java/org/dromara/hutool/core/comparator/IndexedComparatorTest.java

@@ -0,0 +1,78 @@
+package org.dromara.hutool.core.comparator;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import org.dromara.hutool.core.collection.CollUtil;
+import org.dromara.hutool.core.date.StopWatch;
+import org.dromara.hutool.core.lang.Console;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * https://gitee.com/dromara/hutool/pulls/1240
+ */
+public class IndexedComparatorTest {
+	@Test
+	public void sortTest() {
+		final Object[] arr = {"a", "b", new User("9", null), "1", 3, null, "2"};
+		final Collection<Object> set = new HashSet<>(Arrays.asList(arr));
+
+
+		final List<Object> sortSet = CollUtil.sort(set, new ArrayIndexedComparator<>(arr));
+
+		assertEquals("a", sortSet.get(0));
+		assertEquals(new User("9", null), sortSet.get(2));
+		assertEquals(3, sortSet.get(4));
+		assertNull(sortSet.get(5));
+	}
+
+	@Test
+	public void reversedTest() {
+		final Object[] arr = {"a", "b", new User("9", null), "1", 3, null, "2"};
+		final Collection<Object> set = new HashSet<>(Arrays.asList(arr));
+
+		final List<Object> sortSet = CollUtil.sort(set, new ArrayIndexedComparator<>(arr).reversed());
+
+		assertEquals("a", sortSet.get(6));
+		assertNull(sortSet.get(1));
+		assertEquals(new User("9", null), sortSet.get(4));
+		assertEquals(3, sortSet.get(2));
+	}
+
+	@Test
+	@Disabled
+	public void benchmarkSortTest() {
+		final Object[] arr = {"a", "b", new User("9", null), "1", 3, null, "2"};
+		final Collection<Object> set = new HashSet<>(Arrays.asList(arr));
+
+		final StopWatch stopWatch = new StopWatch();
+
+		stopWatch.start();
+		for (int i = 0; i < 10_000_000; i++) {
+			CollUtil.sort(set, new IndexedComparator<>(arr));
+		}
+		stopWatch.stop();
+
+
+		stopWatch.start();
+		for (int i = 0; i < 10_000_000; i++) {
+			CollUtil.sort(set, new ArrayIndexedComparator<>(arr));
+		}
+		stopWatch.stop();
+		Console.log(stopWatch.prettyPrint());
+	}
+
+	@Data
+	@AllArgsConstructor
+	static class User {
+		private String a;
+		private String b;
+	}
+}