private static int DoBenchmark(BenchmarkOptions opts)
{
var N = opts.Count;
var skip = 1000UL;
foreach (var name in PostingListIOFactory.GetNames())
{
DoBenchmarkPostingList(name, N, skip);
}
return(1);
}
private static void DoBenchmarkPostingList(string name, ulong count, ulong skip)
{
using (var ms = new Core.Common.Persistance.MemoryStorage())
{
var address = default(PostingListAddress);
var timer = Stopwatch.StartNew();
using (var writer = PostingListIOFactory.CreateWriter(name, ms.GetReference()))
{
writer.StartList(string.Empty);
for (ulong i = 0; i < count; ++i)
{
writer.AddOccurrence(Occurrence.O(1, 1, skip + i));
}
address = writer.EndList();
}
PrintConsole(ConsoleColor.Magenta, $"Encoder {name}");
PrintConsole(ConsoleColor.Magenta, $"\tCount : {count}");
PrintConsole(ConsoleColor.Magenta, $"\tSize : {ms.Length}");
PrintConsole(ConsoleColor.Magenta, $"\tWrite : {timer.Elapsed}");
timer = Stopwatch.StartNew();
using (var reader = PostingListIOFactory.CreateReader(name, ms.GetReference()))
{
// Linear Scan
{
ulong i = 0;
foreach (var actual in reader.Get(address))
{
var target = Occurrence.O(1, 1, skip + i);
if (target != actual)
{
throw new Exception();
}
++i;
}
}
var list = reader.Get(address).AsSkipList();
for (ulong i = 0; i < count; ++i)
{
var target = Occurrence.O(1, 1, skip + i);
var actual = list.LowerBound(target).FirstOrDefault();
if (target != actual)
{
throw new Exception();
}
}
for (ulong i = 1; i < skip; ++i)
{
var target = Occurrence.O(1, 1, i);
var actual = list.LowerBound(target).FirstOrDefault();
if (actual != Occurrence.O(1, 1, skip))
{
throw new Exception();
}
}
for (ulong i = count + 1; i < count + skip; ++i)
{
var target = Occurrence.O(1, 1, skip + i);
var actual = list.LowerBound(target).FirstOrDefault();
if (actual != Occurrence.Empty)
{
throw new Exception();
}
}
}
PrintConsole(ConsoleColor.Magenta, $"\tSeek : {timer.Elapsed}");
}
}