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Multiplication is faster than bit shifting

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This commit is contained in:
Bond_009 2019-10-20 12:31:59 +02:00
parent b6627af65f
commit 593107e190
3 changed files with 6 additions and 3 deletions
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2
MediaBrowser.Common/Hex.cs
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@ -81,7 +81,7 @@ namespace MediaBrowser.Common
break; // Unreachable break; // Unreachable
} }
bytes[j] = (byte)((a << 4) | b); bytes[j] = (byte)((a * 16) | b);
} }
return bytes; return bytes;

5
benches/Jellyfin.Common.Benches/HexDecodeBenches.cs
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@ -9,7 +9,7 @@ namespace Jellyfin.Common.Benches
[MemoryDiagnoser] [MemoryDiagnoser]
public class HexDecodeBenches public class HexDecodeBenches
{ {
[Params(0, 10, 100, 1000, 10000, 1000000)] [Params(/*0,*/ 10, 100, 1000, 10000, 1000000)]
public int N { get; set; } public int N { get; set; }
private string data; private string data;
@ -40,6 +40,9 @@ namespace Jellyfin.Common.Benches
public byte[] Decode() => Hex.Decode(data); public byte[] Decode() => Hex.Decode(data);
[Benchmark] [Benchmark]
public byte[] Decode2() => Hex.Decode2(data);
//[Benchmark]
public byte[] DecodeSubString() => DecodeSubString(data); public byte[] DecodeSubString() => DecodeSubString(data);
} }
} }

2
benches/Jellyfin.Common.Benches/Program.cs
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@ -7,7 +7,7 @@ namespace Jellyfin.Common.Benches
{ {
public static void Main(string[] args) public static void Main(string[] args)
{ {
_ = BenchmarkRunner.Run<HexEncodeBenches>(); //_ = BenchmarkRunner.Run<HexEncodeBenches>();
_ = BenchmarkRunner.Run<HexDecodeBenches>(); _ = BenchmarkRunner.Run<HexDecodeBenches>();
} }
} }