From da43e35ab290c639c8952809338fe19ea824123e Mon Sep 17 00:00:00 2001
From: Anthony Ramine <n.oxyde@gmail.com>
Date: Thu, 15 Nov 2018 10:05:40 +0100
Subject: [PATCH] Optimise memory allocation in set_webrender_image_key

---
 components/net/image_cache.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/components/net/image_cache.rs b/components/net/image_cache.rs
index 5686b154831..22d6faccae6 100644
--- a/components/net/image_cache.rs
+++ b/components/net/image_cache.rs
@@ -59,6 +59,7 @@ fn set_webrender_image_key(webrender_api: &webrender_api::RenderApi, image: &mut
             pixels::rgba8_premultiply_inplace(bytes.as_mut_slice())
         },
         PixelFormat::RGB8 => {
+            bytes.reserve(image.bytes.len() / 3 * 4);
             for bgr in image.bytes.chunks(3) {
                 bytes.extend_from_slice(&[bgr[2], bgr[1], bgr[0], 0xff]);
             }