From d7ae1f242b2394e91961c448443c92edcc30c0d3 Mon Sep 17 00:00:00 2001
From: Jiahao XU <Jiahao_XU@outlook.com>
Date: Thu, 21 Jul 2022 22:14:20 +1000
Subject: [PATCH] Optimize `Crates2Json::load_from_path`: Use `from_reader`

which avoids reading the entire file into string at once.

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>
---
 src/metafiles/v2.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/metafiles/v2.rs b/src/metafiles/v2.rs
index 3be0ead6..f4ea5573 100644
--- a/src/metafiles/v2.rs
+++ b/src/metafiles/v2.rs
@@ -47,8 +47,8 @@ impl Crates2Json {
     }
 
     pub fn load_from_path(path: impl AsRef<Path>) -> Result<Self, Crates2JsonParseError> {
-        let file = fs::read_to_string(path)?;
-        Ok(serde_json::from_str(&file)?)
+        let file = fs::File::open(path.as_ref())?;
+        Ok(serde_json::from_reader(file)?)
     }
 
     pub fn insert(&mut self, cvs: CrateVersionSource, info: CrateInfo) {