Merge pull request #11910 from dreis2211:optimize-applicationhome-unittest-check

* pr/11910:
  Optimize ApplicationHome.isUnitTest()

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/system/ApplicationHome.java

@@ -105,7 +105,9 @@ public class ApplicationHome {
 
 	private boolean isUnitTest() {
 		try {
-			for (StackTraceElement element : Thread.currentThread().getStackTrace()) {
+			StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
+			for (int i = stackTrace.length - 1; i >= 0; i--) {
+				StackTraceElement element = stackTrace[i];
 				if (element.getClassName().startsWith("org.junit.")) {
 					return true;
 				}