More performance improvements

EightBit/Bus.cs

@@ -3,6 +3,7 @@
 // </copyright>
 
 using System.Diagnostics;
+using System.Runtime.CompilerServices;
 
 namespace EightBit
 {
@@ -35,6 +36,7 @@ namespace EightBit
             this.Poke(absolute.Joined, value);
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Read()
         {
             Debug.Assert(!this._writing, "Writing flag is in an invalid state");
@@ -42,6 +44,7 @@ namespace EightBit
             Debug.Assert(!this._writing, "Writing flag is in an invalid state");
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Write()
         {
             Debug.Assert(!this._writing, "Writing flag is in an invalid state");
@@ -63,6 +66,7 @@ namespace EightBit
 
         public abstract void Initialize();
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         protected ref byte Reference(ushort absolute)
         {
             var mapped = this.Mapping(absolute);
@@ -78,6 +82,7 @@ namespace EightBit
             return ref this._data;
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         protected ref byte Reference() => ref this.Reference(this.Address.Joined);
 
         protected void LoadHexFile(string path)

EightBit/ClockedChip.cs

@@ -20,9 +20,13 @@ namespace EightBit
         public void Tick(int extra = 1)
         {
             this.Cycles += extra;
-            for (var i = 0; i < extra; ++i)
+            var ticked = this.Ticked;
+            if (ticked is not null)
             {
-                this.Ticked?.Invoke(this, EventArgs.Empty);
+                for (var i = 0; i < extra; ++i)
+                {
+                    ticked.Invoke(this, EventArgs.Empty);
+                }
             }
         }
 

EightBit/Processor.cs

@@ -3,6 +3,7 @@
 // </copyright>
 
 using System.Diagnostics;
+using System.Runtime.CompilerServices;
 
 namespace EightBit
 {
@@ -158,12 +159,16 @@ namespace EightBit
 
         protected virtual void HandleINT() => this.RaiseINT();
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         protected void OnReadingMemory() => this.ReadingMemory?.Invoke(this, EventArgs.Empty);
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         protected void OnReadMemory() => this.ReadMemory?.Invoke(this, EventArgs.Empty);
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         protected void OnWritingMemory() => this.WritingMemory?.Invoke(this, EventArgs.Empty);
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         protected void OnWrittenMemory() => this.WrittenMemory?.Invoke(this, EventArgs.Empty);
 
         protected void MemoryWrite(byte low, byte high, byte data)
@@ -186,6 +191,7 @@ namespace EightBit
 
         protected virtual void MemoryWrite() => this.BusWrite();
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         protected void BusWrite() => this.Bus.Write();   // N.B. Should be the only real call into the "Bus.Write" code.
 
         protected void MemoryRead(byte low, byte high)
@@ -202,6 +208,7 @@ namespace EightBit
 
         protected virtual void MemoryRead() => this.BusRead();
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         protected void BusRead() => this.Bus.Read();   // N.B. Should be the only real call into the "Bus.Read" code.
 
         protected virtual void IncrementPC() => this.PC.Increment();