From 4dbba14f4e31da9bcf8fb952f9d08efbd597a371 Mon Sep 17 00:00:00 2001
From: Aditya Kulkarni <zcash@adityapk.com>
Date: Fri, 6 Sep 2019 20:52:36 -0700
Subject: [PATCH] Buffered read/write

---
 rust-lightclient/src/lightclient.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/rust-lightclient/src/lightclient.rs b/rust-lightclient/src/lightclient.rs
index 169f495..24d55a0 100644
--- a/rust-lightclient/src/lightclient.rs
+++ b/rust-lightclient/src/lightclient.rs
@@ -4,6 +4,7 @@ use std::path::Path;
 use std::fs::File;
 use std::io;
 use std::io::prelude::*;
+use std::io::{BufReader, BufWriter};
 
 use std::sync::Arc;
 use std::sync::atomic::{AtomicU64, AtomicUsize, Ordering};
@@ -72,7 +73,7 @@ impl LightClient {
         print!("Reading wallet...");
         io::stdout().flush().ok().expect("Could not flush stdout");
         let mut file_buffer = match File::open("wallet.dat") {
-            Ok(f)  => f,
+            Ok(f)  => BufReader::new(f),
             Err(e) => {
                 println!("[Error: {}]", e.description());
                 return;
@@ -87,7 +88,9 @@ impl LightClient {
     pub fn do_save(&self) {
         print!("Saving wallet...");
         io::stdout().flush().ok().expect("Could not flush stdout");
-        let mut file_buffer = File::create("wallet.dat").unwrap();
+        let mut file_buffer = BufWriter::with_capacity(
+            1_000_000, // 1 MB write buffer
+            File::create("wallet.dat").unwrap());
         
         self.wallet.write(&mut file_buffer).unwrap();
         println!("[OK]");