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Feature description

Currently, there are no standardized benchmarks to measure git-cliff's performance across changes and releases.

This makes it difficult to:

• Detect performance regressions early
• Compare different implementations or configurations objectively
• Validate optimizations with reproducible data

My investigations showed that real-world performance can vary significantly depending on execution environment and subprocess resolution, which further highlights the need for reliable benchmarks.

Desired solution

Introduce a benchmark suite to measure git-cliff's performance in a reproducible way.

Ideally, this would:

• Track execution time and resource usage across versions
• Be runnable in CI or locally in a consistent environment
• Make it easier to validate performance-related changes

One possible direction is to follow an approach similar to ratatui's benchmarking setup, which uses historical commits and realistic workloads.

Alternatives considered

• Relying on ad-hoc local timing (time, profiler tools)
  • Useful for investigation, but not reproducible or comparable over time.
• Simple microbenchmarks
  • Easier to set up, but may not reflect real-world usage or regressions.

Additional context

N/A