From ee45d5bf8f2e1826b2a106b030abe891cfc0b37c Mon Sep 17 00:00:00 2001
From: Nayeem Rahman <nayeemrmn99@gmail.com>
Date: Mon, 8 Jan 2024 17:05:05 +0000
Subject: [PATCH] perf(lsp): use host-owned cache for auto-import completions
 (#21852)

---
 cli/tsc/99_main_compiler.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/cli/tsc/99_main_compiler.js b/cli/tsc/99_main_compiler.js
index 766bc0e6ea..5009807e1c 100644
--- a/cli/tsc/99_main_compiler.js
+++ b/cli/tsc/99_main_compiler.js
@@ -537,6 +537,14 @@ delete Object.prototype.__proto__;
     getProjectVersion() {
       return ops.op_project_version();
     },
+    // @ts-ignore Undocumented method.
+    getModuleSpecifierCache() {
+      return moduleSpecifierCache;
+    },
+    // @ts-ignore Undocumented method.
+    getCachedExportInfoMap() {
+      return exportMapCache;
+    },
     getSourceFile(
       specifier,
       languageVersion,
@@ -766,6 +774,12 @@ delete Object.prototype.__proto__;
     },
   };
 
+  // @ts-ignore Undocumented function.
+  const moduleSpecifierCache = ts.server.createModuleSpecifierCache(host);
+
+  // @ts-ignore Undocumented function.
+  const exportMapCache = ts.createCacheableExportInfoMap(host);
+
   // override the npm install @types package diagnostics to be deno specific
   ts.setLocalizedDiagnosticMessages((() => {
     const nodeMessage = "Cannot find name '{0}'."; // don't offer any suggestions