Optimized imports.

.cargo/config.toml

@@ -0,0 +1,2 @@
+[build]
+rustflags = ["-Ctarget-cpu=native", "-Ctarget-feature=+aes,+sha,+sse,+sse2,+avx,+avx2"]

src/p2p/network.rs

@@ -2,7 +2,7 @@ extern crate serde;
 extern crate serde_json;
 
 use std::{io, thread};
-use std::io::{Read, Write, Error};
+use std::io::{Read, Write};
 use std::sync::{Arc, Mutex, MutexGuard};
 use std::time::{Duration, Instant};