public bool SimpleLinqQuery(Stopwatch watch, int repeatCount, int takeCount)
{
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
{
var q =
(
from n1 in db.Narrows
where n1.ID < 100
select n1.ID
)
.Take(takeCount);
foreach (var item in q)
{
}
}
}
watch.Stop();
return(true);
}
public bool ComplicatedLinqFast(Stopwatch watch, int repeatCount, int takeCount)
{
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
{
var q =
(
from n1 in db.Narrows
join n2 in db.Narrows on new { n1.ID, n1.Field1 } equals new { n2.ID, n2.Field1 }
where n1.ID < 100 && n2.Field1 <= 50
group n1 by n1.ID into gr
select new
{
gr.Key,
Count = gr.Count()
}
)
.OrderBy(n1 => n1.Key)
.Skip(1)
.Take(takeCount);
foreach (var item in q)
{
}
}
}
watch.Stop();
return(true);
}
public bool GetSingleColumnSlow(Stopwatch watch, int repeatCount, int takeCount)
{
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
db.SetCommand(GetSingleColumnSql).ExecuteScalar <int>();
}
watch.Stop();
return(true);
}
public bool GetSingleColumnSlow(Stopwatch watch, int repeatCount, int takeCount)
{
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
db.Narrows.Where(t => t.ID == 1).Select(t => t.ID).AsEnumerable().First();
}
watch.Stop();
return(true);
}
public bool ComplicatedLinqSlow(Stopwatch watch, int repeatCount, int takeCount, int nRows)
{
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
{
var q =
(
from n in db.NarrowLongs
join w in db.WideLongs on n.Field1 equals w.Field1
where
n.ID >= 0 && n.ID <= nRows &&
!new[] { 0, 20, 50, 187635 }.Contains(w.Field1)
select new
{
n.ID,
w.Field1
}
)
.Union
(
from n in db.NarrowLongs
join w in db.WideLongs on n.Field1 equals w.Field1
where
n.ID >= 0 && n.ID <= nRows &&
!new[] { 0, 240, 500, 18635 }.Contains(w.Field1)
select new
{
n.ID,
w.Field1
}
)
.OrderByDescending(n1 => n1.Field1)
.Skip(1000)
.Take(takeCount);
foreach (var item in q)
{
}
}
}
watch.Stop();
return(true);
}
public bool GetWideList(Stopwatch watch, int repeatCount, int takeCount)
{
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
foreach (var item in db.WideLongs.Take(takeCount))
{
}
}
watch.Stop();
return(true);
}
public bool GetSingleColumnParam(Stopwatch watch, int repeatCount, int takeCount)
{
watch.Start();
using (var db = new BLTContext())
for (var i = 0; i < repeatCount; i++)
{
var id = 1;
var p = 2;
db.Narrows.Where(t => t.ID == id && t.Field1 == p).Select(t => t.ID).AsEnumerable().First();
}
watch.Stop();
return(true);
}
public bool GetSingleColumnParam(Stopwatch watch, int repeatCount, int takeCount)
{
watch.Start();
using (var db = new BLTContext())
for (var i = 0; i < repeatCount; i++)
{
db.SetCommand(GetParamSql,
db.Parameter("@id", 1),
db.Parameter("@p", 2))
.ExecuteScalar <int>();
}
watch.Stop();
return(true);
}
public bool GetSingleColumnParam(Stopwatch watch, int repeatCount, int takeCount)
{
var query = CompiledQuery.Compile((BLTContext db, int id, int p) =>
db.Narrows.Where(t => t.ID == id && t.Field1 == p).Select(t => t.ID).First());
watch.Start();
using (var db = new BLTContext())
for (var i = 0; i < repeatCount; i++)
{
query(db, 1, 2);
}
watch.Stop();
return(true);
}
public bool GetSingleColumnSlow(Stopwatch watch, int repeatCount, int takeCount)
{
var query = CompiledQuery.Compile((BLTContext db) =>
db.Narrows.Where(t => t.ID == 1).Select(t => t.ID).First());
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
query(db);
}
watch.Stop();
return(true);
}
public bool GetWideList(Stopwatch watch, int repeatCount, int takeCount)
{
var sql = GetWideListSql(takeCount);
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
foreach (var item in db.SetCommand(sql).ExecuteList(new List <WideLong>(takeCount)))
{
}
}
watch.Stop();
return(true);
}
public bool GetWideList(Stopwatch watch, int repeatCount, int takeCount)
{
var query = CompiledQuery.Compile((BLTContext db, int top) =>
db.WideLongs.Take(top));
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
foreach (var item in query(db, takeCount))
{
}
}
watch.Stop();
return(true);
}
public bool SimpleLinqQuery(Stopwatch watch, int repeatCount, int takeCount)
{
var query = CompiledQuery.Compile((BLTContext db, int top) =>
(
from n1 in db.Narrows
where n1.ID < 100
select n1.ID
)
.Take(top));
watch.Start();
for (var i = 0; i < repeatCount; i++)
{
using (var db = new BLTContext())
foreach (var item in query(db, takeCount))
{
}
}
watch.Stop();
return(true);
}
