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using System;
using System.Threading.Tasks;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;

namespace WebApplication1
{

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async function getUserProfile(userId) {  
    let [user, groups] = await Promise.all([
        db.getUser(userId),
        db.getUserGroups(userId)
    ]);
    return {userId, user, groups};
}

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using System;
using System.Collections.Concurrent;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace Common.Async
{
    public class LimitedLengthActionPool : IDisposable
    {

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace TestApp
{

    public class ParallelWhile

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using (var dbContext = new MainDbContext())
{
    for (var i = 0; i < 100000; i++)
    {
        dbContext.Logs.Add(new Log()
        {
            Key = Guid.NewGuid().ToString("D"),
            Data = "some random data:" + Guid.NewGuid().ToString("D"),
            UpdatedDate = DateTime.UtcNow
        });

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for (var i = 0; i < 100000; i++)
{
	using (var dbContext = new MainDbContext())
	{
		dbContext.Logs.Add(new Log()
		{
			Key = Guid.NewGuid().ToString("D"),
			Data = "some random data:" + Guid.NewGuid().ToString("D"),
			UpdatedDate = DateTime.UtcNow
		});

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using (var dbContext = new MainDbContext())
{
    for (var i = 0; i < 100000; i++)
    {
        dbContext.Database.ExecuteSqlCommand(
        @"INSERT INTO [dbo].[Log] ([Key], [Data], [UpdatedDate])
        VALUES (
          convert(nchar(36), NEWID()), 
          'Some random data:' + convert(nchar(36), NEWID()), 
          GETDATE())");

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db.system.js.save({
        _id: "test",
        value: function () {
            var start = new Date();
            for (var i = 1; i <= 100000; i++) {
                db.getCollection('log').insert({
                    "key": (new ObjectId()).toString(),
                    "data": "some random data: " + (new ObjectId()).toString(),
                    "updated_date": new Date()
                })

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var start = new Date();
for (var i = 1; i <= 100000; i++) {
  db.getCollection('log').insert({
    "key": (new ObjectId()).toString(),
    "data": "some random data: " + (new ObjectId()).toString(),
    "updated_date": new Date()
  }) 
}

print(new Date() - start);

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declare @i int 
set @i = 1
while @i <= 100000
begin

INSERT INTO [dbo].[Log] ([Key], [Data], [UpdatedDate])
     VALUES
           (convert(nchar(36), NEWID()),
           'Some random data:' + convert(nchar(36), NEWID()), 
            GETDATE())