(Over)optimize

NethermindEth · Jun 23, 2023 · cb47b98 · cb47b98
1 parent 39c8868
commit cb47b98
Showing 1 changed file with 28 additions and 36 deletions.
diff --git a/src/Nethermind/Nethermind.Evm/Precompiles/AddressExtensions.cs b/src/Nethermind/Nethermind.Evm/Precompiles/AddressExtensions.cs
@@ -2,47 +2,39 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 
 using System;
+using System.Runtime.InteropServices;
 using Nethermind.Core;
-using Nethermind.Core.Extensions;
 using Nethermind.Core.Specs;
 
-namespace Nethermind.Evm.Precompiles
+namespace Nethermind.Evm.Precompiles;
+
+public static class AddressExtensions
 {
-    public static class AddressExtensions
+    public static bool IsPrecompile(this Address address, IReleaseSpec releaseSpec)
     {
-        private static byte[] _nineteenZeros = new byte[19];
-
-        public static bool IsPrecompile(this Address address, IReleaseSpec releaseSpec)
+        Span<int> data = MemoryMarshal.Cast<byte, int>(address.Bytes.AsSpan());
+        return data[0] == 0 && data[1] == 0 && data[2] == 0 && data[3] == 0 && data[4] switch
         {
-            if (!Bytes.AreEqual(address.Bytes.AsSpan(0, 19), _nineteenZeros))
-            {
-                return false;
-            }
-
-            int precompileCode = address[19];
-            return precompileCode switch
-            {
-                0x01 => true,
-                0x02 => true,
-                0x03 => true,
-                0x04 => true,
-                0x05 => releaseSpec.ModExpEnabled,
-                0x06 => releaseSpec.Bn128Enabled,
-                0x07 => releaseSpec.Bn128Enabled,
-                0x08 => releaseSpec.Bn128Enabled,
-                0x09 => releaseSpec.BlakeEnabled,
-                0x0a => releaseSpec.IsEip4844Enabled,
-                0x0c => releaseSpec.Bls381Enabled,
-                0x0d => releaseSpec.Bls381Enabled,
-                0x0e => releaseSpec.Bls381Enabled,
-                0x0f => releaseSpec.Bls381Enabled,
-                0x10 => releaseSpec.Bls381Enabled,
-                0x11 => releaseSpec.Bls381Enabled,
-                0x12 => releaseSpec.Bls381Enabled,
-                0x13 => releaseSpec.Bls381Enabled,
-                0x14 => releaseSpec.Bls381Enabled,
-                _ => false
-            };
-        }
+            0x01 => true,
+            0x02 => true,
+            0x03 => true,
+            0x04 => true,
+            0x05 => releaseSpec.ModExpEnabled,
+            0x06 => releaseSpec.Bn128Enabled,
+            0x07 => releaseSpec.Bn128Enabled,
+            0x08 => releaseSpec.Bn128Enabled,
+            0x09 => releaseSpec.BlakeEnabled,
+            0x0a => releaseSpec.IsEip4844Enabled,
+            0x0c => releaseSpec.Bls381Enabled,
+            0x0d => releaseSpec.Bls381Enabled,
+            0x0e => releaseSpec.Bls381Enabled,
+            0x0f => releaseSpec.Bls381Enabled,
+            0x10 => releaseSpec.Bls381Enabled,
+            0x11 => releaseSpec.Bls381Enabled,
+            0x12 => releaseSpec.Bls381Enabled,
+            0x13 => releaseSpec.Bls381Enabled,
+            0x14 => releaseSpec.Bls381Enabled,
+            _ => false
+        };
     }
 }