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Optimize StringSequence.startsWith

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See gh-21259
This commit is contained in:
dreis2211
2020-04-29 21:11:42 +02:00
committed by Phillip Webb
parent 7634901fb3
commit 70ffc70993
1 changed files with 8 additions and 4 deletions
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12
spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/StringSequence.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -98,15 +98,19 @@ final class StringSequence implements CharSequence {
return this.source.indexOf(str, this.start + fromIndex) - this.start;
}
boolean startsWith(CharSequence prefix) {
boolean startsWith(String prefix) {
return startsWith(prefix, 0);
}
boolean startsWith(CharSequence prefix, int offset) {
boolean startsWith(String prefix, int offset) {
int prefixLength = prefix.length();
if (length() - prefixLength - offset < 0) {
int length = length();
if (length - prefixLength - offset < 0) {
return false;
}
if (length == this.source.length()) {
return this.source.startsWith(prefix, offset);
}
int prefixOffset = 0;
int sourceOffset = offset;
while (prefixLength-- != 0) {