From 2a096d617b5280faea2d1d5ccb85aded3fc223a5 Mon Sep 17 00:00:00 2001
From: Pierre Delagrave <pierre@moderne.io>
Date: Thu, 4 Dec 2025 10:29:47 -0500
Subject: [PATCH] Improve JAR parsing performance

---
 formats/src/main/kotlin/com/jakewharton/diffuse/format/Jar.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/formats/src/main/kotlin/com/jakewharton/diffuse/format/Jar.kt b/formats/src/main/kotlin/com/jakewharton/diffuse/format/Jar.kt
index 743bebab..d208c586 100644
--- a/formats/src/main/kotlin/com/jakewharton/diffuse/format/Jar.kt
+++ b/formats/src/main/kotlin/com/jakewharton/diffuse/format/Jar.kt
@@ -25,7 +25,7 @@ private constructor(
         val classes =
           zip.entries.filter { it.path.endsWith(".class") }.map { it.asInput().toClass() }
 
-        val declaredMembers = classes.flatMap { it.declaredMembers }
+        val declaredMembers = classes.flatMapTo(LinkedHashSet()) { it.declaredMembers }
         val referencedMembers = classes.flatMapTo(LinkedHashSet()) { it.referencedMembers }
         // Declared methods are likely to reference other declared members. Ensure all are removed.
         referencedMembers -= declaredMembers