From 58eec66b49a2a7156b745753c50080b8afad6b7a Mon Sep 17 00:00:00 2001
From: Ed Page <eopage@gmail.com>
Date: Tue, 20 Nov 2018 09:11:09 -0700
Subject: [PATCH] perf: Default buffer size

Can always use `render_to` if this is too large.
---
 src/template.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/template.rs b/src/template.rs
index 0af2c89b7..17f2083d4 100644
--- a/src/template.rs
+++ b/src/template.rs
@@ -14,7 +14,8 @@ pub struct Template {
 impl Template {
     /// Renders an instance of the Template, using the given globals.
     pub fn render(&self, globals: &interpreter::Globals) -> Result<String> {
-        let mut data = Vec::new();
+        const BEST_GUESS: usize = 10_000;
+        let mut data = Vec::with_capacity(BEST_GUESS);
         self.render_to(&mut data, globals)?;
         Ok(String::from_utf8(data).expect("render only writes UTF-8"))
     }