Timing done. Not conditional yet...

hw7/task1/src/main.rs

 extern crate clap;
 extern crate time;
+
+use time::get_time;
 use clap::{Arg, App, SubCommand};
 use std::process;
 mod hasher_sha256;
     let matches = create_app().get_matches();
     let base = matches.value_of("base").unwrap_or("1");
     let diff = matches.value_of("difficulty").unwrap_or("1");
+    let mut time_measurement = false;
 
     println!("Using base: {}", base);
     println!("Using difficulty: {}", diff);
         process::exit(1)
     }
 
+    if let Some(_) = matches.subcommand {
+        time_measurement = true;
+    }
+
     match base.parse::<usize>() {
         Ok(b) => {
             println!("Please wait...");
+            let start = get_time();
             for n in 0..<usize>::max_value() {
                 if let Some(x) = hash256::verify_product(b, n, &diff.to_string()) {
+                    let end = get_time();
+                    let diff = end - start;
                     println!("Number: {} --> hash: {}", x.number, x.hash);
+                    println!("(Duration {}s / {}ms / {}us)", diff.num_seconds(), diff.num_milliseconds(), diff.num_microseconds().unwrap_or(0));
                     process::exit(0)
                 }
             }