public static void Main1(string[] args)
{
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
PType tp_rec = new PTypeRecord(
new NamedType("id", new PType(PTypeEnumeration.integer)),
new NamedType("name", new PType(PTypeEnumeration.sstring)),
new NamedType("age", new PType(PTypeEnumeration.integer)));
PaCell cell = new PaCell(new PTypeSequence(tp_rec), path + "people.pac", false);
PType tp_pair = new PTypeRecord(
new NamedType("id", new PType(PTypeEnumeration.integer)),
new NamedType("offset", new PType(PTypeEnumeration.longinteger)));
PaCell cell_index = new PaCell(new PTypeSequence(tp_pair), path + "people_index.pac", false);
int npersons = 1_000_000;
Random rnd = new Random();
Console.WriteLine("Start Task04: Main1");
// Загрузка данных
sw.Restart();
cell.Clear();
cell.Fill(new object[0]);
cell_index.Clear();
cell_index.Fill(new object[0]);
for (int i = 0; i < npersons; i++)
{
int code = npersons - i;
long offset = cell.Root.AppendElement(new object[] { code, "=" + code + "=", rnd.Next(120) });
cell_index.Root.AppendElement(new object[] { code, offset });
}
cell.Flush();
cell_index.Flush();
cell_index.Root.SortByKey <int>(pair => (int)((object[])pair)[0]);
sw.Stop();
Console.WriteLine($"load {npersons} records. duration {sw.ElapsedMilliseconds}");
// Поиск
int key = npersons * 2 / 3;
int ntests = 10000;
sw.Restart();
PaEntry entry = cell.Root.Element(0);
for (int j = 0; j < ntests; j++)
{
key = rnd.Next(npersons);
PaEntry en = cell_index.Root.BinarySearchFirst(ent => ((int)((object[])ent.Get())[0]).CompareTo(key));
object operson = entry.SetOffset((long)((object[])en.Get())[1]).Get();
//Console.WriteLine($"val={tp_rec.Interpret(operson)}");
}
sw.Stop();
Console.WriteLine($"getByKey {ntests} times. duration {sw.ElapsedMilliseconds}");
}
