From 20e270d0c732c3586be0094f3591530720badb55 Mon Sep 17 00:00:00 2001
From: Jarred Sumner <jarred@jarredsumner.com>
Date: Sat, 14 Sep 2024 18:33:16 -0400
Subject: [PATCH] Optimize already-evaluated dynamic imports

---
 Source/JavaScriptCore/builtins/ModuleLoader.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Source/JavaScriptCore/builtins/ModuleLoader.js b/Source/JavaScriptCore/builtins/ModuleLoader.js
index ded73f1f53072..97462fd806233 100644
--- a/Source/JavaScriptCore/builtins/ModuleLoader.js
+++ b/Source/JavaScriptCore/builtins/ModuleLoader.js
@@ -636,7 +636,14 @@ async function requestImportModule(moduleName, referrer, parameters, fetcher)
         await importMap;
         key = this.resolve(moduleName, referrer, fetcher);
     }
-    var entry = await this.requestSatisfy(this.ensureRegistered(key), parameters, fetcher, new @Set);
+    var entry = this.ensureRegistered(key);
+    if (entry.evaluated) {
+        return this.getModuleNamespaceObject(entry.module);
+    }  
+    entry = await this.requestSatisfy(entry, parameters, fetcher, new @Set);
+    if (entry.evaluated) {
+        return this.getModuleNamespaceObject(entry.module);
+    }
     await this.linkAndEvaluateModule(entry.key, fetcher);
     return this.getModuleNamespaceObject(entry.module);
 }