From bd5be982e9f6005ecbac76f04c879b6039ad278a Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Thu, 16 Jul 2026 10:24:16 +0300
Subject: [PATCH] LibC: Don't memset 0 mmap'd callocs

There is no reason to page everything in and the kernel already
guarantees that the memory is zeroed in mmap
---
 userspace/libraries/LibC/malloc.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/userspace/libraries/LibC/malloc.cpp b/userspace/libraries/LibC/malloc.cpp
index 6de1a611..12efe1c6 100644
--- a/userspace/libraries/LibC/malloc.cpp
+++ b/userspace/libraries/LibC/malloc.cpp
@@ -370,7 +370,8 @@ void* calloc(size_t nmemb, size_t size)
 	if (ptr == nullptr)
 		return nullptr;
 
-	memset(ptr, 0, total);
+	if (total < s_mmap_threshold)
+		memset(ptr, 0, total);
 	return ptr;
 }