From 406acd17af7f6f41186216fdb054c0f4a5d6580e Mon Sep 17 00:00:00 2001
From: Ms2ger <ms2ger@gmail.com>
Date: Mon, 9 Jun 2014 14:06:03 +0200
Subject: [PATCH] Avoid reallocations with variadic arguments.

Thanks to huon for pointing that out.
---
 src/components/script/dom/bindings/codegen/CodegenRust.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/components/script/dom/bindings/codegen/CodegenRust.py b/src/components/script/dom/bindings/codegen/CodegenRust.py
index 069254b7c16..0f8de8249cb 100644
--- a/src/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/src/components/script/dom/bindings/codegen/CodegenRust.py
@@ -941,7 +941,7 @@ class CGArgumentConverter(CGThing):
             seqType = CGTemplatedType("Vec", declType)
             variadicConversion = string.Template(
                 "{\n"
-                "  let mut vector: ${seqType} = vec![];\n"
+                "  let mut vector: ${seqType} = Vec::with_capacity((${argc} - ${index}) as uint);\n"
                 "  for variadicArg in range(${index}, ${argc}) {\n"
                 "${inner}\n"
                 "    vector.push(slot);\n"