public void HighCardinalityMergeWithPool()
{
var sw = Stopwatch.StartNew();
var pool = HyperLogLogPlus.CreateMemPool();
var hll = new HyperLogLogPlus(18, 25, pool);
var hll_t = new HyperLogLogPlus(18, 25, pool);
var buf = new byte[8];
const int size = (int)100000;
for (int i = 0; i < size / 100; ++i)
{
var hll3 = new HyperLogLogPlus(18, 25, pool);
for (int j = 0; j < 100; ++j)
{
Rnd.NextBytes(buf);
hll3.OfferHashed(Hash64(buf));
}
hll_t = hll.Merge(hll3);
hll.Dispose();
hll = hll_t;
hll3.Dispose();
}
Console.WriteLine("expected: {0}, estimate: {1}, time: {2}", size, hll.Cardinality(), sw.Elapsed);
long estimate = hll.Cardinality();
double err = Math.Abs(estimate - size) / (double)size;
Console.WriteLine("Percentage error: " + err);
Assert.That(err, Is.LessThan(0.1));
hll.Dispose();
}
