From 8c92e88765817877f53a9cfb70c3e39853456868 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Tue, 1 Oct 2019 14:39:13 -0700
Subject: [PATCH] Disable preserving mtimes on archives

These are just wasted syscalls for our purposes, no need to issue
updates to the modification/creation/access times of files we unpack!
---
 src/cargo/sources/registry/mod.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/cargo/sources/registry/mod.rs b/src/cargo/sources/registry/mod.rs
index 533f987998b..dc543caef01 100644
--- a/src/cargo/sources/registry/mod.rs
+++ b/src/cargo/sources/registry/mod.rs
@@ -463,6 +463,7 @@ impl<'cfg> RegistrySource<'cfg> {
 
         let gz = GzDecoder::new(tarball);
         let mut tar = Archive::new(gz);
+        tar.set_preserve_mtime(false);
         let prefix = unpack_dir.file_name().unwrap();
         let parent = unpack_dir.parent().unwrap();
         for entry in tar.entries()? {