public static void Test()
{
int N = 1000000;
int variation = 10000000;
long listStart = -1;
var timer = Stopwatch.StartNew();
var ar = new ulong[N];
using (var mem = new MemoryStorage())
{
using (var writer = new DeltaVarIntListWriter(mem.GetReference()))
{
var s1 = writer.StartList();
var prev = 0UL;
var r = new Random(2019);
for (int i = 0; i < N; ++i)
{
prev += 1 + (ulong)r.Next(variation);
ar[i] = prev;
writer.AddValue(prev);
}
var e1 = writer.EndList();
Console.WriteLine($"Count : {N}");
Console.WriteLine($"Length : {e1 - s1}");
listStart = s1;
}
Console.WriteLine($"Write : {timer.Elapsed}");
timer = Stopwatch.StartNew();
using (var reader = new DeltaVarIntListReader(mem.GetReference()))
{
int i = 0;
foreach (var v in reader.Get(listStart))
{
if (ar[i] != v)
{
throw new Exception($"{ar[i]} != {v} at {i}");
}
++i;
}
}
Console.WriteLine($"Read : {timer.Elapsed}");
timer = Stopwatch.StartNew();
using (var reader = new DeltaVarIntListReader(mem.GetReference()))
{
for (int i = 0; i < N; ++i)
{
var v = reader.GetLowerBound(listStart, ar[i]).First();
if (ar[i] != v)
{
throw new Exception($"{ar[i]} != {v} at {i}");
}
}
}
Console.WriteLine($"Seek : {timer.Elapsed}");
}
}
protected override void DoStart()
{
base.DoStart();
indexInfo = new PersistentIndexInfo(Folder, PersistentIndex.FileNameInfo);
fields = PersistentMetadataFactory.CreateStorage(name.FieldsType, Folder, PersistentIndex.FileNameFields);
occurrenceWriter = PostingListIOFactory.CreateWriter(name.PostingType, Folder, PersistentIndex.FileNamePostingLists);
dictionaryWriter = PersistentDictionaryFactory.CreateWriter(name.DictionaryType, Folder, PersistentIndex.FileNameDictionary, MaxTokenSize, name.TextEncoding);
dictionaryUpdate = dictionaryWriter.BeginUpdate();
posIndexWriter = PersistentDictionaryFactory.CreateWriter(name.DictionaryType, Folder, PersistentIndex.FileNamePosIndex, PersistentIndex.PosIndexKeySize, name.TextEncoding);
posIndexUpdate = posIndexWriter.BeginUpdate();
positionsWriter = new DeltaVarIntListWriter(Folder, PersistentIndex.FileNamePositions);
dictUpdates = 0;
posUpdates = 0;
}
