Make hot methods in-line friendly

Refactor a few hot methods so that they are more likely to be in-lined
by the JIT.

Fixes gh-11409

spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/AsciiBytes.java

@@ -211,7 +211,7 @@ final class AsciiBytes {
 		if (this == obj) {
 			return true;
 		}
-		if (obj.getClass().equals(AsciiBytes.class)) {
+		if (obj.getClass() == AsciiBytes.class) {
 			AsciiBytes other = (AsciiBytes) obj;
 			if (this.length == other.length) {
 				for (int i = 0; i < this.length; i++) {