boxing stopwatch

more cost-intensive, and it is possible to trigger a GC operation, and unpacking is just a process that takes a pointer and consumes less resources than boxing. Note: an object can only be restored to a previously unboxed type after unpacking , for example: You cannot pack the Int32 type to revert to the Int16 type. So when the interview can and the interviewer outfit B ~ ~ The test example value type reference type initializes the time of N consumpt

in 2477 Ms. In and other words try to Avoid boxing and unboxing. In a project where you need boxing and unboxing, the use of it when it ' s absolutely necessary.With this article, the sample code is attached which demonstrates this performance implication.Currently I has not included source code for unboxing and the same holds true for it. You can write code and experiment it using the

());Getstringtime (number);Getstringbulider (number);GETSTRINGTIME1 (number);GetStringBulider1 (number);}Test String Performance Timeprivate void Getstringtime (int number){Stopwatch watch = new Stopwatch ();listWatch. Start ();String str = "SELECT * from testa inner join quick sort time consuming quick sequencing time consuming";for (int i = 0; i {Li. ADD (str);}Watch. Stop ();Label1. Text = watch. Elapse

HEADP opens up space, it will inevitably trigger garbage collection (GC). The GC is not triggered in the thread statck.So if you keep going to new a someclassref and new Somestructval, the time will be a big difference. It can be speculated that the somestructval time will certainly be less than someclassref. Here is the test codePrivate Const int Time_max = 100000000; static void Main (string[] args) {teststruct (); TestClass (); Console.ReadLine ();

stringName {Get; Set; } Public stringEmail {Get; Set; } Public intAge {Get; Set; } Public intCompareTo (Objectobj) {Person P= obj asPerson ; return This. Age-P.age; } } Packing and unpackingValue types go directly to the reference type as boxing; The reference type is converted directly to a value type of unboxing. classProgram {Static voidMain (string[] args) { //int n = 10; //string s = n.tostring ();//not

The previous blog learned how to use multithreading in a simple way. In fact, the common multithreading is really simple, but a safe and efficient multithreading is not so simple. So many times improper use of multithreading will affect the performance of the program.Let's look at an example below:classProgram {Static intnum =1; Static voidMain (string[] args) {Stopwatch Stopwatch=NewStopwatch (); //Start T

When a data source (such as a DataTable, Array, List, ObservableCollection, or other IListSource, etc.) is bound to a control, you should break the refresh of the binding or pending controls when you bulk manipulate the data.This.gcBillList.DataSource = null;datarowcollection rows = this.ds.tables[0]. Rows;foreach (DataRow row in rows) { //DataRow data operation}this.gcbilllist.datasource = This.ds.tables[0]. DefaultView; 3. Reduce the number of communication between client and server

consumption When a data source (such as a DataTable, Array, List, ObservableCollection, or other IListSource, etc.) is bound to a control, you should break the refresh of the binding or pending controls when you bulk manipulate the data.This.gcBillList.DataSource = null;datarowcollection rows = this.ds.tables[0]. Rows;foreach (DataRow row in rows) { //DataRow data operation}this.gcbilllist.datasource = This.ds.tables[0]. DefaultView; 3. Reduce the number of communication between cli

compiler parse generics? In the previous topic, I posted the comparison results of generics and non-generics to show that generics have high performance advantages, but did not give the specific reasons that lead to higher efficiency of generics than non-generics, this section analyzes the specific causes of generic efficiency. Here we will first post the code that describes the benefits of generic high performance in the previous topic, and then check the IL code to demonstrate the high perfo

SYN5301 type Time Verification DeviceFixture overviewOur fixture can be placed horizontally measured stopwatch, but also vertical measurement of the stopwatch, and other manufacturers of fixtures can only be measured horizontally, if you want to vertical measurement to rely on the wall or other objects to test, so that the detected data will have a certain deviation, and their fixture rough, 2, other manufa

ListGeneric collection, which can replace ArrayListCommon methodsListlistnewList Method Name function ADD () adding elements AddRange Add a Collection ToArray () To turn a collection into an array Array has a method called ToList (), you can turn the array into a set;Why use list instead of ArrayListBox packing and unpackingConverting a value type to a reference type called

called "Packing", and the process from the reference type to the value type is changed to "unpacking ". If you compile the above Code and view it in ILDASM (an IL decompilation tool), you will find out what it looks like in the IL code. The IL code generated after the sample code is compiled is displayed. VII. packing and unpacking performance problems To understand the performance impact of packing and unpacking, We cyclically run the two function methods shown 10000 times. The first method c

the heap to the stack. System performance is inevitably affected, whether it is moving from Stack to stack or from Stack to stack. As a result, two new terms emerged: when the data is converted from the value type to the reference type, it is called "Packing", and the process from the reference type to the value type is changed to "unpacking ". If you compile the above Code and view it in ILDASM (an IL decompilation tool), you will find out what it looks like in the IL code. The IL code genera

Test Platform: Pentium 1.6G dual-core CPU1 GB memoryTest the debugging environment of vs2008. 1. ArrayList (100 W, 1 W)Stopwatch timer = new Stopwatch (); Timer. Start (); System. Collections. ArrayList al = new System. Collections. ArrayList (); For (int I = 0; I {Al. Add (I );} Timer. Stop (); Console. Write (timer. ElapsedMilliseconds. ToString () + "\ t "); Stopwa