Fixed high CPU usage, duplicate peers from exchange and tab change code.

src/main.rs

@@ -9,7 +9,7 @@ use std::env;
 use std::sync::{Arc, Mutex};
 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
 use std::thread;
-use std::time::Duration;
+use std::time::{Duration, Instant};
 
 #[cfg(windows)]
 use winapi::um::wincon::{AttachConsole, FreeConsole, ATTACH_PARENT_PROCESS};
@@ -165,7 +165,7 @@ fn run_interface(context: Arc<Mutex<Context>>, miner: Arc<Mutex<Miner>>) {
     let scripts = inline_script(include_str!("webview/scripts.js"));
 
     let html = Content::Html(file_content.to_owned().replace("{styles}", &styles).replace("{scripts}", &scripts));
-    web_view::builder()
+    let mut interface = web_view::builder()
         .title("ALFIS 0.1.0")
         .content(html)
         .size(1024, 720)
@@ -282,8 +282,36 @@ fn run_interface(context: Arc<Mutex<Context>>, miner: Arc<Mutex<Miner>>) {
             //dbg!(&signature);
             Ok(())
         })
-        .run()
-        .unwrap();
+        .build()
+        .expect("Error building GUI");
+
+    // We use this ugly loop to lower CPU usage a lot.
+    // If we use .run() or only .step() in a loop without sleeps it will try
+    // to support 60FPS and uses more CPU than it should.
+    let pause = Duration::from_millis(25);
+    let mut start = Instant::now();
+    loop {
+        match interface.step() {
+            None => {
+                info!("Interface closed, exiting");
+                break;
+            }
+            Some(result) => {
+                match result {
+                    Ok(_) => {}
+                    Err(_) => {
+                        error!("Something wrong with webview, exiting");
+                        break;
+                    }
+                }
+            }
+        }
+        if start.elapsed().as_millis() > 1 {
+            thread::sleep(pause);
+            start = Instant::now();
+        }
+    }
+    interface.exit();
 }
 
 fn create_genesis<S: Into<String>>(miner: Arc<Mutex<Miner>>, name: S, keystore: &Keystore, difficulty: u16) {

src/p2p/peers.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 use std::net::{SocketAddr, Shutdown};
 use mio::{Token, Interest, Registry};
 use mio::net::TcpStream;
@@ -54,12 +54,27 @@ impl Peers {
     }
 
     pub fn add_peers_from_exchange(&mut self, peers: Vec<String>) {
-        info!("Got peers: {:?}", &peers);
+        let peers: HashSet<String> = peers
+            .iter()
+            .fold(HashSet::new(), |mut peers, peer| {
+                peers.insert(peer.to_owned());
+                peers
+            });
+        debug!("Got {} peers: {:?}", peers.len(), &peers);
         // TODO make it return error if these peers are wrong and seem like an attack
         for peer in peers.iter() {
             let addr: SocketAddr = peer.parse().expect(&format!("Error parsing peer {}", peer));
+
+            if self.peers
+                .iter()
+                .find(|(token, peer)| peer.get_addr() == addr)
+                .is_some() {
+                debug!("Skipping address from exchange: {}", &addr);
+                continue;
+            }
+
             if skip_addr(&addr) {
-                info!("Skipping address from exchange: {}", &addr);
+                debug!("Skipping address from exchange: {}", &addr);
                 continue; // Return error in future
             }
             let mut found = false;

src/webview/scripts.js

@@ -97,7 +97,7 @@ function openTab(element, tabName) {
     // Get all elements with class="content" and hide them
     tabContent = document.getElementsByClassName("content");
     for (i = 0; i < tabContent.length; i++) {
-        tabContent[i].className = "context is-hidden";
+        tabContent[i].className = "content is-hidden";
     }
 
     // Get all elements with class="tablinks" and remove the class "active"