referee stopwatch

failure, you can control it by configuring the restartable parameter of the Job. The default value is true. If re-execution is required, work und: * Add a JobParameters build class with the current time as the parameter to ensure different job instances */LOG when other parameters are the same. debug ("start... "); StopWatch stopWatch = new StopWatch ();

static int i;static Rectangle() { i = 200; } } The Type constructor should not call the Type constructor of the base type, because the type cannot have static fields that are shared or inherited from the base type. Although the Type constructor can be defined in the value type, never do this: Struct Point{Static Point (){Console. WriteLine ("This statement will never be displayed"); // because CLR will not call a static constructor of the value type.}} Type constructor perf

time. Therefore, many people prefer to use a static object storage SqlConnection to maintain physical connections. However, when using static objects, multi-threaded access may cause some problems. In fact, we do not need to do this at all, because SqlConnection enables the connection pool function by default, when the program executes SqlConnection. after Close, the physical connection will not be released immediately. Therefore, when the Open operation is executed cyclically, the execution ti

physical connection is established, these operations will not be performed. These operations take some time. Therefore, many people prefer to use a static object storage SqlConnection to maintain physical connections. However, when using static objects, multi-threaded access may cause some problems. In fact, we do not need to do this at all, because SqlConnection enables the connection pool function by default, when the program executes SqlConnection. after Close, the physical connection will n

To create a database:--create databasecreate database bulktestdb;gouse bulktestdb;go--create tablecreate table bulktesttable (Id int Primary Key,username nvarchar (+), Pwd varchar (+)) go--create table Valuedcreate TYPE Bulkudt as Table (Id int, UserName nvarchar (+), Pwd varchar (16))First, plain SQL is inserted with insert: Stopwatch SW = new Stopwatch (); SqlConnection sqlconn = new SqlCo

; Pooling = False ;";Stopwatch sw = new Stopwatch ();Sw. Start ();Using (SqlConnection conn =New SqlConnection (connectionString )) {Conn. Open (); }Sw. Stop ();Console. WriteLine ("Without Pooling, first connection elapsed {0} ms", sw. ElapsedMilliseconds );Sw. Reset ();Sw. Start ();For (int I = 0; I {Using (SqlConnection conn = new SqlConnection (connectionString )) {Conn. Open (); } }Sw.

Technical solution:A new feature of ADO. net2.0: sqlbulkcopy. For this performance, I personally tested the performance a long time ago and the efficiency was very high. Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->/// /// Use sqlbulkcopy to insert data /// /// /// Private Static long sqlbulkcopyinsert () { Stopwatch stopwatch = new

Spring boot in-depth principle-springapplication startup principleWe know that if you don't need a special configuration, just call the Springapplicatio.run () method in the main method to start the Spring boot app: Public static void main(String[] args) throws Exception { springapplication. Run(application. Class, args); } As the first in-depth principle, let's take a look at how the spring boot application started.Springapplication START Process

, through the console program to simulate the user login business logic, if the first logon success, then the user information is written to the memcached cache, log in again when the user information can be obtained from the cache to verify. The following is a detailed code procedure:Data operation Interface:1 namespace memcachedlibrary 2 {3 interface Idataoperator 4 {5 //Get database connection 6 SqlConnection OpenConnection (); 7 //Get user information 8

. Nodejs var start = new Date (). GetTime ();var a=0;for (Var i=0;ia++;}var end = new Date (). GetTime ();Console.log ((End-start) + "MS");The result is 1.17s. C#: Using System;Using System.Diagnostics;public class Test{public static void Main (){Stopwatch SW = new Stopwatch ();Long a=0;Sw. Start ();for (long i=0;ia++;}Sw. Stop ();TimeSpan TS2 = sw. Elapsed;Console.WriteLine ("

1 ', 160 UNION all SELECT NEWID (), ' Cattle 2 ', 180 UNION All ... Mode four: Splicing SQL INSERT into Product (id,name,price) VALUES (NEWID (), ' pen 1 ', 160) , (NEWID (), ' Pen 2 ',) ... There are four different ways to implement bulk operations in C # by Ado.net. Way one: inserting #region Way One static void Insertone () {Console.WriteLine ("implemented in a single insert Way"); stopwatch SW = new

{System.Web.HttpContext.Current.Response.Write (i.ToString ());}}public static void Havetry (){Try{for (int i = 0; I {System.Web.HttpContext.Current.Response.Write (i.ToString ());}}catch (Exception err){System.Web.HttpContext.Current.Response.Write (Err. ToString ());}}public static long Haveexception (){stopwatch SW = new Stopwatch ();Sw. Start ();Try{for (int i = 0; I {System.Web.HttpContext.Current.Res

The requirement is that there are 16 binary strings to save as byte arrays such as String st = "0a000000", convert to byte after byte[0]=10,byte[1]=0,byte[2]=0,byte[3]=0 Net2.0 can use convert to convert a hexadecimal string to byte. The code is as follows: public static byte [] Writebytes1 (String sbytes)... {Stopwatch watch = new stopwatch ();Watch. Reset ();Watch. Start ();Debug.Assert (sbytes.length% 2

(NEWID (), ' Cattle barn 1 ', (newid (), ' Cattle Barn 2 segment ', 260) ... There are four ways to implement bulk operations in C # by using ADO.Method One: Insert #region way a static void Insertone () {Console.WriteLine ("implemented in an insert-by-line manner"); Stopwatch SW = new Stopwatch (); The using (SqlConnection conn = new SqlConnection (strconnmsg))//using wil

///Program Entry3 /// 4 /// 5 Private Static voidMain (string[] args)6 {7Thread thread =NewThread (NewThreadStart (ShowTime));8Thread. IsBackground =true;9 thread. Start ();Ten Console.WriteLine (thread. Isthreadpoolthread); OneThread.Sleep (Ten); A thread. Interrupt (); - //thread. Abort (); - //thread. priority = Threadpriority.highest; the //thread. Resume (); - //thread. Join (); -Console.WriteLine ("End

the LINQ methods of Max, first, last, and so on. It is similar to the usage of enumerable, you can refer to Microsoft's MSDN to understand its specific usage.There are a lot of thread-safe collections, similar to those we normally use, such as dictionary concurrentdictionary, and Concurrentstack,concurrentqueue.second, the usage and performance of Parallel LINQ1, AsParallelAs you learned about parallel for and foreach, let's take a look at the parallel versions of LINQ today. To test, we add a

configuration differences, etc., it is difficult to use a unified tool to monitor code level performance indicators. Logging can be easily added to a variety of programs and is the least expensive way to spend resources and time. PERF4J provides a CSV-formatted conversion tool that enables developers to easily summarize statistical results with the help of Third-party tools. Integrated into applications Here are two ways to use the APIs provided by PER4J. In practical projects, flexible selec

code:public class Custom {public string Name {get; set;} public int Age {get; set;} public string Address {get; set;} }Write the following test code: public static void Testplinq () {Stopwatch SW = new Stopwatch (); listIn fact, add a AsParallel () method, below to see the results of the operation:The time difference is one times, but sometimes does not differ so much, depends on

/news/downfile/1451357093411/1451357212770/jquery-alarm-clock.rar Today we will share a digital clock based on jQuery. A major feature of this jQuery clock is that you can set an alarm and make a good alarm plug-in. Click the set alarm button to bring up a dialog box. You can activate the alarm after a few minutes. For example, if the alarm is activated one minute later, set 1 in minutes. One minute later, an alarm box will pop up with a sound prompt. 5. jQuery cool plane clock special effect p

HTML5 's strength is not only to make the page elements more flexible, but also because it can be very convenient to achieve the effect of Web animation, you can make your site more modern features. Today, we will share 8 unforgettable HTML5 Cool Animation ~1, HTML5 canvas flame flashing animation Flame following the mouse ( special effects Show ) ( Source Download )The animation is based on canvas, the flame is moving up and down the effect is very realistic, and the flame can follow the mouse