LibJS: Log scripts parsed by JS::Script::parse() and how long it took

1 files changed, 6 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Script.cpp b/Userland/Libraries/LibJS/Script.cpp
index 14286749df..35e807bfc1 100644
--- a/Userland/Libraries/LibJS/Script.cpp
+++ b/Userland/Libraries/LibJS/Script.cpp
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibCore/ElapsedTimer.h>
 #include <LibJS/AST.h>
 #include <LibJS/Lexer.h>
 #include <LibJS/Parser.h>
@@ -14,6 +15,11 @@ namespace JS {
 // 16.1.5 ParseScript ( sourceText, realm, hostDefined ), https://tc39.es/ecma262/#sec-parse-script
 NonnullRefPtr<Script> Script::parse(StringView source_text, Realm& realm, StringView filename)
 {
+    auto timer = Core::ElapsedTimer::start_new();
+    ScopeGuard timer_guard([&] {
+        dbgln("JS::Script: Parsed {} in {}ms", filename, timer.elapsed());
+    });
+
     // 1. Let body be ParseText(sourceText, Script).
     auto body = Parser(Lexer(source_text, filename)).parse_program();