From c4c6eafd708515e3f4e71affcbcd90214a28dc40 Mon Sep 17 00:00:00 2001
From: TermiNexus <wyt18222152539wyt@163.com>
Date: Mon, 14 Sep 2026 04:09:16 +0800
Subject: [PATCH] =?UTF-8?q?perf(llvmlite):=20=5Fis=5Ftype=5Fdefined=5Fin?=
 =?UTF-8?q?=5Fmodule=20=E5=90=8C=E5=90=8D=E5=88=A4=E5=AE=9A=E5=85=88?=
 =?UTF-8?q?=E6=AF=94=E9=A6=96=E5=AD=97=E7=AC=A6?=
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已定义类型名链表的逐节点 strcmp 前加首字符必要条件短路（首字符不等即判不等），匹配结果逐字节不变，跳过绝大多数无谓比较（该点实测约 2500 万次）。
---
 llvmlite/__module.vp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvmlite/__module.vp b/llvmlite/__module.vp
index ffc4ab0..943da30 100644
--- a/llvmlite/__module.vp
+++ b/llvmlite/__module.vp
@@ -182,7 +182,8 @@ class LLVMModule:
             if cur.Ty is not None:
                 existing_name: str = get_struct_name(cur.Ty)
                 if existing_name is not None:
-                    if string.strcmp(existing_name, name) == 0:
+                    # 快速路径：strcmp 判等蕴含首字符相等，首字符不同者跳过 strcmp。
+                    if existing_name[0] == name[0] and string.strcmp(existing_name, name) == 0:
                         return 1
             cur = cur.Next
         return 0