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}");
}
}
public IEnumerable <TextPosition> GetPositions(ulong docId, ulong fieldId)
{
var key = GetKeyForPositions('P', docId, fieldId);
var matcher = new DfaTermMatcher(new SequenceMatcher <char>(key, false));
var term = PosIndex.GetTerms(matcher).Single();
var offset = -1;
foreach (var pos in PositionsReader.Get(term.Value.Offset))
{
if (offset == -1)
{
offset = (int)pos;
}
else
{
yield return(TextPosition.P(offset - 1, (int)pos - offset));
offset = -1;
}
}
}
