Index::from_file use deserialize_from to save memory

1 files changed, 4 insertions, 3 deletions

diff --git a/src/index.rs b/src/index.rs
index be23e0e..5d2abb6 100644
--- a/src/index.rs
+++ b/src/index.rs
@@ -1,7 +1,7 @@
 use std::collections::HashMap;
 use std::hash::Hash;
 use std::fs::File;
-use std::io::BufWriter;
+use std::io::{BufWriter, BufReader};
 use std::thread;
 use walkdir::*;
 use hash32::Hasher;
@@ -106,8 +106,9 @@ impl Index {
     }
 
     pub fn from_file(path : &String) -> Self {
-        let bytes = std::fs::read(path).expect("could not read index file");
-        let filecache : Vec<FileCache> = bincode::deserialize(&bytes).unwrap();
+        let file = File::open(path).expect("could not read index file");
+        let reader = BufReader::new(file);
+        let filecache : Vec<FileCache> = bincode::deserialize_from(reader).unwrap();
 
         Self {
             filecache