From 1bba40a32f4e9c16fc3bd21ae6643b505e948e16 Mon Sep 17 00:00:00 2001
From: LettuceLeaves <2878506229@qq.com>
Date: Wed, 19 Nov 2025 00:20:56 +0800
Subject: [PATCH] =?UTF-8?q?perf:=E4=BC=98=E5=8C=96isSubEquals=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95=EF=BC=8C=E5=8E=BB=E9=99=A4toString()=E9=98=B2?=
 =?UTF-8?q?=E6=AD=A2=E6=8B=B7=E8=B4=9D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../hutool/v7/core/text/CharSequenceUtil.java | 29 ++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/hutool-core/src/main/java/cn/hutool/v7/core/text/CharSequenceUtil.java b/hutool-core/src/main/java/cn/hutool/v7/core/text/CharSequenceUtil.java
index e443dd4a0..ecf0fcdfb 100644
--- a/hutool-core/src/main/java/cn/hutool/v7/core/text/CharSequenceUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/v7/core/text/CharSequenceUtil.java
@@ -2416,8 +2416,35 @@ public class CharSequenceUtil extends StrValidator {
 		if (null == str1 || null == str2) {
 			return false;
 		}
+		if (str1 instanceof String && str2 instanceof String) {
+			return ((String) str1).regionMatches(ignoreCase, offset1, (String) str2, offset2, length);
+		}
+		if (offset1 < 0 || offset2 < 0 || length < 0) {
+			return false;
+		}
+		if (str1.length() - offset1 < length || str2.length() - offset2 < length) {
+			return false;
+		}
+		for (int i = 0; i < length; i++) {
+			final char c1 = str1.charAt(offset1 + i);
+			final char c2 = str2.charAt(offset2 + i);
+			if (c1 == c2) {
+				continue;
+			}
+			if (ignoreCase) {
+				final char u1 = Character.toUpperCase(c1);
+				final char u2 = Character.toUpperCase(c2);
+				if (u1 == u2) {
+					continue;
+				}
+				if (Character.toLowerCase(u1) == Character.toLowerCase(u2)) {
+					continue;
+				}
+			}
+			return false;
+		}
 
-		return str1.toString().regionMatches(ignoreCase, offset1, str2.toString(), offset2, length);
+		return true;
 	}
 	// endregion