Use BufReader and BufWriter

substrate/network-libp2p/src/topology.rs

@@ -19,7 +19,7 @@ use parking_lot::Mutex;
 use libp2p::{Multiaddr, PeerId};
 use serde_json;
 use std::{cmp, fs};
-use std::io::{Read, Cursor, Error as IoError, ErrorKind as IoErrorKind, Write};
+use std::io::{Read, Cursor, Error as IoError, ErrorKind as IoErrorKind, Write, BufReader, BufWriter};
 use std::path::{Path, PathBuf};
 use std::time::{Duration, Instant, SystemTime};
 
@@ -101,7 +101,7 @@ impl NetTopology {
 		};
 
 		let file = fs::File::create(path)?;
-		serialize(file, &self.store)
+		serialize(BufWriter::with_capacity(1024 * 1024, file), &self.store)
 	}
 
 	/// Perform a cleanup pass, removing all obsolete addresses and peers.
@@ -513,7 +513,7 @@ fn try_load(path: impl AsRef<Path>) -> FnvHashMap<PeerId, PeerInfo> {
 
 	let mut first_byte = [0];
 	let num_read = match file.read(&mut first_byte) {
-		Ok(f) => f,
+		Ok(f) => BufReader::with_capacity(1024 * 1024, f),
 		Err(err) => {
 			// TODO: DRY
 			warn!(target: "sub-libp2p", "Failed to read peer storage file: {:?}", err);