Not bad.

Author: Daniel Lemire

README.md

@@ -3,29 +3,21 @@
 
 This is a fast C# library to process unicode strings.
 
-*It is currently not meant to be usable.*
 
 ## Motivation
 
-The most important immediate goal would be to speed up the 
-`Utf8Utility.GetPointerToFirstInvalidByte` function.
+We seek to speed up the `Utf8Utility.GetPointerToFirstInvalidByte` function. Using the algorithm used by Node.js, Oracle GraalVM  and other important systems.
 
-https://github.com/dotnet/runtime/blob/4d709cd12269fcbb3d0fccfb2515541944475954/src/libraries/System.Private.CoreLib/src/System/Text/Unicode/Utf8Utility.Validation.cs
-
-
-(We may need to speed up `Ascii.GetIndexOfFirstNonAsciiByte` first, see issue https://github.com/simdutf/SimdUnicode/issues/1.)
-
-The question is whether we could do it using this routine:
+- John Keiser, Daniel Lemire, [Validating UTF-8 In Less Than One Instruction Per Byte](https://arxiv.org/abs/2010.03090), Software: Practice and Experience 51 (5), 2021
 
-* John Keiser, Daniel Lemire, [Validating UTF-8 In Less Than One Instruction Per Byte](https://arxiv.org/abs/2010.03090), Software: Practice and Experience 51 (5), 2021
+The function is private in the Runtime, but we can expose it manually.
 
-Our generic implementation is available there: https://github.com/simdutf/simdutf/blob/master/src/generic/utf8_validation/utf8_lookup4_algorithm.h
+https://github.com/dotnet/runtime/blob/4d709cd12269fcbb3d0fccfb2515541944475954/src/libraries/System.Private.CoreLib/src/System/Text/Unicode/Utf8Utility.Validation.cs
 
-Porting it to C# is no joke, but doable.
 
 ## Requirements
 
-We recommend you install .NET 7: https://dotnet.microsoft.com/en-us/download/dotnet/7.0
+We recommend you install .NET 8: https://dotnet.microsoft.com/en-us/download/dotnet/8.0
 
 
 ## Running tests
@@ -62,33 +54,6 @@ cd benchmark
 sudo dotnet run -c Release
 ```
 
-Still under macOS or Linux, you can change the filter parameter to narrow down the benchmarks you'd like to run:
-
-```
-cd benchmark
-sudo dotnet run -c Release --filter *RealData*
-```
-
-To get a list of all available tests you may enter:
-
-```
-cd benchmark
-sudo dotnet run -c Release --list tree
-```
-
-To get a prettier list in tree format, you may enter:
-
-```
-cd benchmark
-sudo dotnet run -c Release --list tree
-```
-
-To run all benchmarks, you may enter:
-
-```
-sudo dotnet run -c Release runall
-```
-
 ## Building the library
 
 ```
@@ -105,6 +70,18 @@ cd test
 dotnet format
 ```
 
+## Programming tips
+
+You can print the content of a vector register like so:
+
+```C#
+        public static void ToString(Vector256<byte> v)
+        {
+            Span<byte> b = stackalloc byte[32];
+            v.CopyTo(b);
+            Console.WriteLine(Convert.ToHexString(b));
+        }
+```
 
 ## More reading 
 

benchmark/ASCII_runtime.cs

@@ -19,7 +19,7 @@
 //Vector128's by 16 (see:https://source.dot.net/#System.Private.CoreLib/src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector128.cs,eb1e72a6f843c5a5)
 // GetIndexofFirstNonAsciiByte is no longer internal
 
-namespace Competition
+namespace DotnetRuntime
 {
     // I copy pasted this from: https://source.dot.net/#System.Private.CoreLib/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/CompExactlyDependsOnAttribute.cs
     // Use this attribute to indicate that a function should only be compiled into a Ready2Run