dotnet/BenchmarkDotNet

Calculate baseline by fastest with config

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#1,024 opened on Jan 24, 2019

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Description

Hi, I'm implementing a : ManualConfig and I want to have the "Ratio" column. Adding it with Add(BaselineRatioColumn.RatioMean); works fine.

But I always want the baseline to be the fastest run instead of having to manually (predetermine) what benchmark should be considered the baseline.

Is that possible somehow? If so, how?

Contributor guide

Tech stack
csharp
Domain
performance
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
C# knowledgeUnderstanding of BenchmarkDotNet configuration
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate how the baseline is currently set in BenchmarkDotNet, particularly in `ManualConfig` and the `Add(BaselineRatioColumn.RatioMean)` method. Look for where the baseline benchmark is determined and consider adding an option to use the fastest run as baseline. The relevant code likely resides in `BenchmarkDotNet.Columns` or `BenchmarkDotNet.Configs`.