From cafe175700183b44d62ce488435ea630e460e113 Mon Sep 17 00:00:00 2001
From: Luca Bruno <lucab@lucabruno.net>
Date: Mon, 12 Feb 2024 14:11:16 +0100
Subject: [PATCH] parser: allocate vector with exact capacity (#894)

This tweaks `parse_content()` logic in order to reduce the amount
of vector growing, as the final vector capacity is already known
beforehand.
---
 src/parser/mod.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 0a5bf388..07982c1a 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -1044,9 +1044,10 @@ fn parse_if(pair: Pair<Rule>) -> TeraResult<Node> {
 }
 
 fn parse_content(pair: Pair<Rule>) -> TeraResult<Vec<Node>> {
-    let mut nodes = vec![];
+    let pairs = pair.into_inner();
+    let mut nodes = Vec::with_capacity(pairs.len());
 
-    for p in pair.into_inner() {
+    for p in pairs {
         match p.as_rule() {
             Rule::include_tag => nodes.push(parse_include(p)),
             Rule::comment_tag => nodes.push(parse_comment_tag(p)),