static void Main()
{
var db = new AdsEntities();
var ads = db.Ads.ToList();
// Variant 1.
var starTime = DateTime.Now;
var ads1 = db.Ads
.First();
var endTime = DateTime.Now;
Console.WriteLine(endTime - starTime);
// Variant 2.
starTime = DateTime.Now;
var ads2 = db.Ads
.Select(a => a.Title)
.First();
endTime = DateTime.Now;
Console.WriteLine(endTime - starTime);
}
public static void SelectEverything(AdsEntities context)
{
var testQuery = context.Ads.Select(a => a);
foreach (var ad in testQuery)
{
Console.WriteLine(ad.Title);
}
}
public static void SelectCertainColumn(AdsEntities context)
{
var testQuery = context.Ads.Select(a => a.Title);
foreach (var ad in testQuery)
{
Console.WriteLine(ad);
}
}
private static void Optimized(AdsEntities context)
{
var allAds = context.Ads
.Where(a => a.AdStatus.Status == "Published")
.OrderBy(a => a.Date)
.Select(a => new
{
a.Title,
Category = a.Category != null ? a.Category.Name : null,
Town = a.Town != null ? a.Town.Name : null,
a.Date
});
}
static void Main()
{
var context = new AdsEntities();
//This neutralize the first time connect to base that takes time
context.Ads.Count();
context.Database.ExecuteSqlCommand("CHECKPOINT");
context.Database.ExecuteSqlCommand("DBCC DROPCLEANBUFFERS");
double sum = 0;
int runs = 1;
var stopwatch = new Stopwatch();
stopwatch.Start();
for (int i = 0; i < 10; i++)
{
Console.WriteLine("Run #{0}", runs++);
SelectEverything(context);
double time = stopwatch.Elapsed.TotalSeconds;
Console.WriteLine("----{0:F4}", time);
sum += time;
}
Console.WriteLine("Average time non-optimized: {0:F4}", sum / 10);
Console.WriteLine();
runs = 1;
double sum2 = 0;
stopwatch.Restart();
for (int i = 0; i < 10; i++)
{
Console.WriteLine("Run #{0}", runs++);
SelectCertainColumn(context);
double time = stopwatch.Elapsed.TotalSeconds;
Console.WriteLine("----{0:F4}", time);
sum2 += time;
}
Console.WriteLine("Average time optimized: {0:F4}", sum2 / 10);
}
static void Main()
{
var context = new AdsEntities();
//Count of queries = 28
foreach (var ad in context.Ads)
{
Console.WriteLine("{0} - {1} \n Category: {2} \n Town: {3} \n User: {4}\n",
ad.Title, ad.AdStatus, ad.Category, ad.Town, ad.AspNetUser);
}
//Count of queries = 1
foreach (var ad in context.Ads
.Include(a => a.AdStatus)
.Include(a => a.Category)
.Include(a => a.Town)
.Include(a => a.AspNetUser))
{
Console.WriteLine("Ad Status: {0}\nCategory: {1}\nTown: {2}\nUser: {3}",
ad.AdStatus, ad.Category, ad.Town, ad.AspNetUser);
}
}
static void Main()
{
var context = new AdsEntities();
//This neutralize the first time connect to base that takes time
context.Ads.Count();
double sum = 0;
int runs = 1;
var stopwatch = new Stopwatch();
stopwatch.Start();
for (int i = 0; i < 10; i++)
{
Console.WriteLine("Run #{0}", runs++);
NonOptimized(context);
double time = stopwatch.Elapsed.TotalSeconds;
Console.WriteLine("{0:F4}", time);
sum += time;
}
Console.WriteLine("Average time non-optimized: {0:F4}", sum / 10);
Console.WriteLine();
runs = 1;
double sum2 = 0;
stopwatch.Restart();
for (int i = 0; i < 10; i++)
{
Console.WriteLine("Run #{0}", runs++);
Optimized(context);
double time = stopwatch.Elapsed.TotalSeconds;
Console.WriteLine("{0:F4}", time);
sum2 += time;
}
Console.WriteLine("Average time optimized: {0:F4}", sum2 / 10);
}
static void Main()
{
var db = new AdsEntities();
//// Variant 1. CountOfQueries = 1
//var ads = db.Ads.Select(a => new
//{
// a.Title,
// a.AdStatus,
// a.Category,
// a.Town,
// a.AspNetUser
//});
//foreach (var ad in ads)
//{
// Console.WriteLine("{0} - {1} \n Category: {2}; Town: {3} \n User: {4}\n",
// ad.Title, ad.AdStatus, ad.Category, ad.Town, ad.AspNetUser);
//}
// Variant 2. CountOfQueries = 30
foreach (var ad in db.Ads)
{
Console.WriteLine("{0} - {1} \n Category: {2}; Town: {3} \n User: {4}\n",
ad.Title, ad.AdStatus, ad.Category, ad.Town, ad.AspNetUser);
}
//// Variant 3. CountOfQueries = 1
//foreach (var ad in db.Ads
// .Include(a => a.AdStatus)
// .Include(a => a.Town)
// .Include(a => a.Category)
// .Include(a => a.AspNetUser))
//{
// Console.WriteLine("{0} - {1} \n Category: {2}; Town: {3} \n User: {4}\n",
// ad.Title, ad.AdStatus, ad.Category, ad.Town, ad.AspNetUser);
//}
}
