It makes sense to me that a hand-written code is probably going to outperform regex given you're using a purpose-written "tool" vs a more general purpose one, though I guess it depends on how smart the code generator is for the regex.
I'm curious, did you make use of the Compiled option for your use case? For Spans, are you thinking of https://devblogs.microsoft.com/dotnet/regex-performance-improvements-in-net-5/ (where they utilise spans internally)? There's also https://github.com/dotnet/runtime/issues/23602 (which doesn't appear to be implemented yet) and https://github.com/dotnet/runtime/issues/59629 (which does link to some source generator stuff apparently coming in .NET 7) For .NET 6, I only see one mention of Regexes in https://devblogs.microsoft.com/dotnet/performance-improvements-in-net-6/ David On Sat, 22 Jan 2022 at 14:37, Greg Keogh <gfke...@gmail.com> wrote: > Is this a personal challenge or can you just use something like grep on >> WSL? >> > > The million+ lines of parsing will be happening in a live app that's > nearly complete. The lines come from an Azure Blob and are parsed and > transformed into some POCOs for the app to display and filter -- *Greg* > >>
