From a982bb3205bc1eae3fde5a05d4c873a065ee9a4b Mon Sep 17 00:00:00 2001
From: Basilisk-Dev <basiliskdev@protonmail.com>
Date: Thu, 16 Apr 2026 12:10:10 -0400
Subject: [PATCH] Issue #3050 - Backport 1431353: Remove off-thread parse
 thread limit

---
 js/src/vm/HelperThreads.cpp | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/js/src/vm/HelperThreads.cpp b/js/src/vm/HelperThreads.cpp
index ca5b3020a5..6d86db53d6 100644
--- a/js/src/vm/HelperThreads.cpp
+++ b/js/src/vm/HelperThreads.cpp
@@ -927,11 +927,7 @@ GlobalHelperThreadState::maxParseThreads() const
     if (IsHelperThreadSimulatingOOM(js::oom::THREAD_TYPE_PARSE))
         return 1;
 
-    // Don't allow simultaneous off thread parses, to reduce contention on the
-    // atoms table. Note that wasm compilation depends on this to avoid
-    // stalling the helper thread, as off thread parse tasks can trigger and
-    // block on other off thread wasm compilation tasks.
-    return 1;
+    return threadCount;
 }
 
 size_t