There’s some awesome string comparison OrdinalIgnoreCase improvements coming in .NET 8, although I did see one regression too.
Click on the benchmarks for a larger view in a new window …
Looks like a lot of the benefit comes as the strings to compare get larger while for smaller strings the change in some instances may have an overhead but I think this a good trade off IMHO as comparisons with smaller strings will likely be fast already.
This improvement should help a lot of apps as string comparison is such a frequent use case.
PR responsible for performance change
Vectorize String.Equals for OrdinalIgnoreCase by EgorBo · Pull Request #77947 · dotnet/runtime (github.com)
Benchmark code if you’d like to try and re-create
.NET 7 v .NET String.Equals OrdinalIgnoreCase benchmarks (github.com)
