public void DensityHintsAreEqualToDensities()
{
BucketContainer bucketContainer = _fixture.SampleEvents3;
var densitiesBySeconds = bucketContainer.GetDensities(bucketContainer.FirstTimestamp, bucketContainer.LastTimestamp, Durations.Second);
var densitiesByMinutes = bucketContainer.GetDensities(bucketContainer.FirstTimestamp, bucketContainer.LastTimestamp, Durations.Minute);
_densityPrecalculationProcess.Complete(bucketContainer);
var hints = bucketContainer.DensityHintContainer;
Assert.NotNull(hints);
Assert.Equal(densitiesBySeconds.Length, (int)hints.Seconds.Keys.Max());
Assert.Equal(densitiesByMinutes.Length, (int)hints.Minutes.Keys.Max());
foreach (var hint in hints.Seconds)
{
Assert.True(hint.Key >= 1);
Assert.Equal(densitiesBySeconds[hint.Key - 1], hint.Value);
}
foreach (var hint in hints.Minutes)
{
Assert.True(hint.Key >= 1);
Assert.Equal(densitiesByMinutes[hint.Key - 1], hint.Value);
}
}
private static void ShowChart(BucketContainer container, long start, long end, ushort chartWidth)
{
SegmentSize[] preferredSizes = container.GetPreferredSegmentSizes(start, end, chartWidth);
if (preferredSizes.Length < 1)
{
throw new InvalidOperationException();
}
long segmentSize = preferredSizes[preferredSizes.Length - 1].RequestedValue;
end = start + segmentSize * chartWidth;
Console.WriteLine("Here are densities for chart of width equal to {0}px", chartWidth);
var densities = container.GetDensities(start, end, segmentSize);
foreach (var density in densities)
{
Console.BackgroundColor = ConsoleColor.Black;
Console.Write($"{{0,{7}:0.00}}% ", density * 100);
Console.BackgroundColor = ConsoleColor.Gray;
var percent = (int)(density * (Console.WindowWidth - 10));
for (var i = 1; i <= percent; i++)
{
Console.Write(' ');
}
Console.WriteLine();
}
Console.WriteLine();
Console.BackgroundColor = ConsoleColor.Black;
}
private static void RunPerfomanceTests(BucketContainer container, long start, long end, long[] segmentSizes)
{
bool isWarmUp = true;
int tries = 0;
while (tries < 2)
{
var stopWatch = new Stopwatch();
foreach (var segmentSize in segmentSizes)
{
long tStart = start, tEnd = Math.Min(start + segmentSize * 4000, end);
stopWatch.Start();
var densities = container.GetDensities(tStart, tEnd, segmentSize);
var elapsed = stopWatch.ElapsedMilliseconds;
stopWatch.Reset();
if (!isWarmUp)
{
Console.WriteLine("Segment size {0,10}: {1,4}ms elapsed for the range with length {2}μs: average density = {3}",
segmentSize, elapsed, tEnd - tStart, densities.Average());
}
}
tries++;
isWarmUp = false;
}
}
public IEnumerable <IFigure> GetFiguresToDraw(long offset, long width, SegmentSize segmentSize)
{
if (ChartHeight <= 0)
{
return(Enumerable.Empty <IFigure>());
}
long firstTimestamp = _container.FirstTimestamp;
long start = firstTimestamp + offset;
long end = firstTimestamp + offset + width * segmentSize.DisplayedValue;
if (segmentSize.RequestedValue > 1)
{
Span <double> densities = _container.GetDensities(start, end, segmentSize.RequestedValue, ref _targetBuffer);
return(GetFiguresFromDensities(_targetBuffer, 0, densities.Length));
}
else if (segmentSize.RequestedValue == 1)
{
var events = _container.GetRealEvents(start, end + 1);
return(GetFiguresFromEvents(events, offset, start, end));
}
return(Enumerable.Empty <IFigure>());
}