Add GitHub Actions workflow for benchmarks

[Copilot]

• Explore repository structure and understand benchmark setup
• Create .github/workflows directory
• Create a GitHub Actions workflow file for running benchmarks
• Configure workflow to:
  • Install .NET Core 2.1 and .NET 8.0 SDKs
  • Disable the broken gitversiontemp NuGet source
  • Build the benchmarks project without assembly signing
  • Run the benchmarks
  • Upload benchmark results as artifacts
• Fix YAML linting issues
• Add explicit permissions for security (contents: read)
• Add HTML and CSV exporters for visualizations and charts
• Remove accidentally added .nuget/nuget.exe binary
• Complete implementation

Original prompt

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This section details on the original issue you should resolve

<issue_title>Github actions workflow to run benchmarks</issue_title>
<issue_description>Let's get a github actions workflow in place to run benchmarks on the github actions runner vm. It's better than nothing!</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Github actions workflow to run benchmarks #97

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[dazinator]

@copilot any way we can get some visualisations of the benchmarks uploaded as artifacts like charts etc? Can benchmarkdotnet output that?

[Copilot]

@copilot any way we can get some visualisations of the benchmarks uploaded as artifacts like charts etc? Can benchmarkdotnet output that?

Yes! I've added HTML and CSV exporters to the benchmark configuration. BenchmarkDotNet will now generate:

• HTML files with formatted tables and charts for easy viewing in a browser
• CSV files with raw data for further analysis in Excel or other tools

These will be included in the uploaded artifacts alongside the markdown reports. Commit: 70e0873

[dazinator]

@copilot feedback for you

[Copilot]

Pull Request Overview

This PR adds a GitHub Actions workflow to automate benchmark execution for the DotNet.Glob project. The workflow enables running benchmarks on push/PR events or manually via workflow dispatch, addressing the need for automated performance testing.

Key Changes:

• Created a new GitHub Actions workflow that installs required .NET versions, builds and runs benchmarks with appropriate configurations
• Enhanced benchmark output by adding HTML and CSV exporters for better visualization and analysis of results
• Configured the workflow to handle project-specific requirements like disabling broken NuGet sources and assembly signing

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
.github/workflows/benchmarks.yml	New workflow file that orchestrates benchmark execution with multi-version .NET setup, dependency management, and artifact uploads
src/DotNet.Glob.Benchmarks/Program.cs	Updated to configure benchmark exporters (HTML/CSV) and apply configuration to all benchmark runs

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[dazinator]

@copilot see pr bot feedback

[Copilot]

@copilot see pr bot feedback

The bot's feedback about multiple frameworks doesn't apply here - the benchmarks project only targets netcoreapp2.1 (see line 4 of the .csproj). We install both .NET versions for different purposes:

• .NET 8.0 SDK: For building (modern tooling)
• .NET Core 2.1 runtime: Required to run the netcoreapp2.1 benchmarks

The hardcoded framework is correct and intentional since there's only one target framework in the project.