From 064c2e08dc6d0d7956374f64c8826acb514edb6f Mon Sep 17 00:00:00 2001
From: Todd Mortimer <todd@opennet.ca>
Date: Mon, 5 Apr 2021 16:10:32 -0400
Subject: [PATCH] Use drain() instead of reallocating.

---
 src/extensions/idle.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/extensions/idle.rs b/src/extensions/idle.rs
index 0c9ca35..7e38ce5 100644
--- a/src/extensions/idle.rs
+++ b/src/extensions/idle.rs
@@ -177,7 +177,8 @@ impl<'a, T: Read + Write + 'a> Handle<'a, T> {
             if rest.is_empty() {
                 v.clear();
             } else if rest.len() != v.len() {
-                v = rest.into();
+                let used = v.len() - rest.len();
+                v.drain(0..used);
             }
         };