From e79055c51101ebd78400c58fa84a9a2c7513aa8c Mon Sep 17 00:00:00 2001
From: Gary Guo <gary@garyguo.net>
Date: Tue, 9 Feb 2021 06:47:38 +0000
Subject: [PATCH] Increase the threshold for using word-copy

---
 src/mem/impls.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mem/impls.rs b/src/mem/impls.rs
index b237817d..283a918b 100644
--- a/src/mem/impls.rs
+++ b/src/mem/impls.rs
@@ -3,7 +3,7 @@ use core::intrinsics::likely;
 const WORD_SIZE: usize = core::mem::size_of::<usize>();
 const WORD_MASK: usize = WORD_SIZE - 1;
 
-const WORD_COPY_THRESHOLD: usize = 2 * WORD_SIZE;
+const WORD_COPY_THRESHOLD: usize = if 2 * WORD_SIZE > 16 { 2 * WORD_SIZE } else { 16 };
 
 #[inline(always)]
 unsafe fn copy_forward_bytes(mut dest: *mut u8, mut src: *const u8, n: usize) {