Use instant instead systemtime (#1369)

Author: qarmin

czkawka_core/src/common.rs

@@ -5,7 +5,7 @@ use std::path::{Path, PathBuf};
 use std::sync::atomic::{AtomicBool, AtomicUsize};
 use std::sync::{atomic, Arc};
 use std::thread::{sleep, JoinHandle};
-use std::time::{Duration, SystemTime};
+use std::time::{Duration, Instant};
 use std::{fs, thread};
 
 use crossbeam_channel::Sender;
@@ -529,10 +529,10 @@ pub fn prepare_thread_handler_common(
         let atomic_counter = atomic_counter.clone();
         thread::spawn(move || {
             // Use earlier time, to send immediately first message
-            let mut time_since_last_send = SystemTime::now() - Duration::from_secs(10u64);
+            let mut time_since_last_send = Instant::now().checked_sub(Duration::from_secs(10u64)).unwrap();
 
             loop {
-                if time_since_last_send.elapsed().expect("Cannot count time backwards").as_millis() > SEND_PROGRESS_DATA_TIME_BETWEEN as u128 {
+                if time_since_last_send.elapsed().as_millis() > SEND_PROGRESS_DATA_TIME_BETWEEN as u128 {
                     let progress_data = ProgressData {
                         sstage,
                         checking_method,
@@ -546,7 +546,7 @@ pub fn prepare_thread_handler_common(
                     progress_data.validate();
 
                     progress_send.send(progress_data).expect("Cannot send progress data");
-                    time_since_last_send = SystemTime::now();
+                    time_since_last_send = Instant::now();
                 }
                 if !progress_thread_run.load(atomic::Ordering::Relaxed) {
                     break;

czkawka_core/src/similar_images.rs

@@ -2,7 +2,7 @@ use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
 use std::io::Write;
 use std::path::{Path, PathBuf};
 use std::sync::atomic::Ordering;
-use std::time::SystemTime;
+use std::time::Instant;
 use std::{mem, panic};
 
 use bk_tree::BKTree;
@@ -890,21 +890,12 @@ pub fn test_image_conversion_speed() {
                     for size in [8, 16, 32, 64] {
                         let hasher_config = HasherConfig::new().hash_alg(alg).resize_filter(filter).hash_size(size, size);
 
-                        let start = SystemTime::now();
+                        let start = Instant::now();
 
                         let hasher = hasher_config.to_hasher();
                         let _hash = hasher.hash_image(&img_open);
 
-                        let end = SystemTime::now();
-
-                        println!(
-                            "{:?} us {:?} {:?} {}x{}",
-                            end.duration_since(start).expect("Used time backwards").as_micros(),
-                            alg,
-                            filter,
-                            size,
-                            size
-                        );
+                        println!("{:?} us {:?} {:?} {}x{}", start.elapsed().as_micros(), alg, filter, size, size);
                     }
                 }
             }