avoid reallocations

src/main.rs

@@ -483,7 +483,7 @@ fn get_stats(port: &mut Box<dyn SerialPort>, id: u32) -> StatsOptions {
     };
 
     let split: Vec<&str> = response.split_whitespace().collect();
-    let mut nums: Vec<u32> = Vec::new();
+    let mut nums: Vec<u32> = Vec::with_capacity(5);
 
     for i in split {
         match i.parse() {