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⚡️ Speed up method StringUtils.hasLineBreak by 62% #10

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⚡️ Speed up method StringUtils.hasLineBreak by 62% #10

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14 changes: 13 additions & 1 deletion rewrite-core/src/main/java/org/openrewrite/internal/StringUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -735,7 +735,19 @@ public static String formatUriForPropertiesFile(String uri) {
}

public static boolean hasLineBreak(@Nullable String s) {
return s != null && LINE_BREAK.matcher(s).find();
if (s == null) {
return false;
}
// Single-pass scan for Unicode line break characters to avoid regex overhead.
int len = s.length();
for (int i = 0; i < len; i++) {
char c = s.charAt(i);
if (c == '\n' || c == '\r' || c == '\u000B' || c == '\u000C' ||
c == '\u0085' || c == '\u2028' || c == '\u2029') {
return true;
}
}
return false;
}

public static boolean containsWhitespace(String s) {
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