public static MethodHistoryModel ForMachineMethod(BenchmarkRepository repository, string machine, string method, bool allResults)
{
var runs = repository.RunsByMachine[machine];
List<Entry> entries = new List<Entry>();
BenchmarkResult previousResult = null;
// Work things out in ascending time order, then reverse later. Too confusing otherwise!
foreach (var run in runs.OrderBy(f => f.Start))
{
var result = run.AllResults.FirstOrDefault(m => m.FullMethod == method);
if (result == null && previousResult == null)
{
continue;
}
if (result == null)
{
entries.Add(new Entry(run, "Method removed"));
}
else if (allResults)
{
entries.Add(new Entry(run, result.NanosecondsPerCall + "ns"));
}
else if (previousResult == null)
{
entries.Add(new Entry(run, "Method introduced"));
}
else
{
// TODO: This only spots sudden improvements, not gradual improvements over time. Consider
// remembering the "last change" result and using that instead.
long percent = (result.PicosecondsPerCall * 100) / previousResult.PicosecondsPerCall;
if (percent > BenchmarkDiff.RegressionThreshold)
{
entries.Add(new Entry(run, string.Format("Regression: {0}ns to {1}ns", previousResult.NanosecondsPerCall, result.NanosecondsPerCall)));
}
if (percent < BenchmarkDiff.ImprovementThreshold)
{
entries.Add(new Entry(run, string.Format("Improvement: {0}ns to {1}ns", previousResult.NanosecondsPerCall, result.NanosecondsPerCall)));
}
}
previousResult = result;
}
entries.Reverse();
return new MethodHistoryModel { Machine = machine, Method = method, Entries = entries.ToImmutableList(), AllResults = allResults};
}
public BenchmarksController(BenchmarkRepository repository, ImmutableList<SourceLogEntry> log)
{
this.repository = repository;
this.log = log;
}