Started using more efficient methods of calculating time in performan…

…ce oriented fields (https://www.youtube.com/watch?v=Lvdyi5DWNm4) Signed-off-by: Kristian Gergov <[email protected]>
t1stm · Oct 29, 2024 · b9ee7be · b9ee7be
1 parent 47a4070
commit b9ee7be
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Showing 3 changed files with 16 additions and 13 deletions.
diff --git a/ThirtyDollarConverter/PCMEncoder.cs b/ThirtyDollarConverter/PCMEncoder.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Numerics;
@@ -261,11 +262,11 @@ await Parallel.ForAsync(1, working_threads + 1, (i, _) =>
 
             if (start > length) return ValueTask.CompletedTask;
 
-            var start_time = DateTime.Now;
+            var start_time = Stopwatch.GetTimestamp();
             ProcessChunk(start, end, mixer, channel, events, processed_events, biggest_event_length);
-            var end_time = DateTime.Now;
+            var delta = Stopwatch.GetElapsedTime(start_time);
             Log(
-                $@"Processed chunk i: {i} in {end_time - start_time:ss\.ffff} s. Start: {start}, End: {end}, ChunkSize: {chunk_size}, Length: {length}");
+                $@"Processed chunk i: {i} in {delta:ss\.ffff} s. Start: {start}, End: {end}, ChunkSize: {chunk_size}, Length: {length}");
 
             return ValueTask.CompletedTask;
         });

diff --git a/ThirtyDollarVisualizer/Helpers/Timing/SeekableStopwatch.cs b/ThirtyDollarVisualizer/Helpers/Timing/SeekableStopwatch.cs
@@ -1,3 +1,5 @@
+using System.Diagnostics;
+
 namespace ThirtyDollarVisualizer.Helpers.Timing;
 
 public class SeekableStopwatch
@@ -6,8 +8,8 @@ public class SeekableStopwatch
     protected TimeSpan LastValue = TimeSpan.Zero;
 
     protected bool Running;
-    protected DateTime StartTime = DateTime.MinValue;
-    protected DateTime? StopTime;
+    protected long StartTime = long.MinValue;
+    protected long? StopTime;
 
     public TimeSpan Elapsed
     {
@@ -28,7 +30,7 @@ public TimeSpan Elapsed
                 StopTime = null;
             }
 
-            var val = LastValue = current_time - StartTime;
+            var val = LastValue = Stopwatch.GetElapsedTime(StartTime, current_time);
 
             Lock.Release();
             return val;
@@ -38,15 +40,15 @@ public TimeSpan Elapsed
     public long ElapsedMilliseconds => (long)Elapsed.TotalMilliseconds;
     public bool IsRunning => Running;
 
-    protected static DateTime GetCurrentTime()
+    protected static long GetCurrentTime()
     {
-        return DateTime.Now;
+        return Stopwatch.GetTimestamp();
     }
 
     public void Start()
     {
         if (Running) return;
-        if (StartTime == DateTime.MinValue)
+        if (StartTime == long.MinValue)
             Restart();
         Running = true;
     }
@@ -80,7 +82,7 @@ public void Stop()
         Lock.Wait();
 
         Running = false;
-        StopTime = DateTime.Now;
+        StopTime = Stopwatch.GetTimestamp();
 
         Lock.Release();
     }
@@ -93,7 +95,7 @@ public void Seek(long delta)
         LastValue = wanted_time;
 
         var current = GetCurrentTime();
-        var delta_time = current - wanted_time;
+        var delta_time = current - wanted_time.Ticks * Stopwatch.Frequency / 10000000;
         StartTime = delta_time;
 
         if (StopTime != null) StopTime = current;

diff --git a/ThirtyDollarVisualizer/Objects/DollarStoreCamera.cs b/ThirtyDollarVisualizer/Objects/DollarStoreCamera.cs
@@ -8,7 +8,7 @@ public sealed class DollarStoreCamera : Camera
     private readonly float _scrollSpeed;
     private Vector3 _offset = (0, 0, 0);
     private Vector3 _virtualPosition;
-    private DateTime LastScaleUpdate = DateTime.Now;
+    private long LastScaleUpdate = Stopwatch.GetTimestamp();
 
     public DollarStoreCamera(Vector3 VirtualPosition, Vector2i viewport, float scroll_speed = 7.5f) : base(
         VirtualPosition, viewport)
@@ -52,7 +52,7 @@ private void BlockingPulse(int times, float delay_ms)
         stopwatch.Start();
 
         const float max_add_scale = .05f;
-        var now = LastScaleUpdate = DateTime.Now;
+        var now = LastScaleUpdate = Stopwatch.GetTimestamp();
         do
         {
             if (Disposing) return;