microbenchmarking

# Benchmark Authoring Guidelines BenchmarkDotNet (BDN) is a .NET library for writing and running microbenchmarks. Throughout this skill, "BDN" refers to BenchmarkDotNet. > **Note:** Evaluations of LLMs writing BenchmarkDotNet benchmarks have revealed common failure patterns caused by outdated assumptions about BDN's behavior — particularly around runtime comparison, job configuration, and execution defaults that have changed in recent versions. The reference files in this skill contain verified, current information. **You MUST read the reference files relevant to the task before writing any code** — your training data likely contains outdated or incorrect BDN patterns. ## Key concepts - **Job** — describes how to run a benchmark: runtime, iteration counts, launch count, run strategy, and environment settings. Multiple jobs can be configured to run the same benchmarks under different conditions. - **Benchmark case** — one method × one parameter combination × one job. The atomic unit BDN measures. - **Operation** — the logical unit of work being measured. All BDN output columns (Mean, Error, etc.) report time per operation. - **Invocation** — a single call to the benchmark method. By default, 1 invocation = 1 operation. With `OperationsPerInvoke=N`, each invocation counts as N operations. - **Iteration** — a timed batch of invocations. BDN measures the total time for all invocations in an iteration, then divides by the total operation count to get per-operation time. ## Be...