Has anyone experienced a performance decrease after migrating a project to ..NET? We migrated our code from ASP to ASP.NET, modifying sintax whenever needed. Basically, the application is the same but it now has its code separated into the .aspx and codebehind (.aspx.vb) files. After compiling...more >>

My app processes about 5K-10K records (~50 columns/record) in RAM. I need to have a quick way to insert (w/ sort), update and delete partially at a time. For example, it inserts 100 rows, update other 400 rows, delete some or all... You got the idea. One of the scenarios, I had this data in...more >>

Does anyone know how to get the total and used RAM programmatically of the local system? That means, I want to get Memory information like Task Manager does. Thanks. -- Your 2 cents are worth $milion$. Thanks....more >>

A web application of mine developed using C# + MS SQL runs fine normally. However when I stress test it with a load testing software (using about 60 simultaneous users) some instances start erroring out. I see two different errors. One is a "Object reference not set to an instance of an object....more >>

I have a need to implement a linked list that will hold a large number of items. I have done a little performance testing to compare the linked list against the framework's standard hashtable. So far the linked list meets my objectives in all ways -- except for one problem that it exhibits. I...more >>

Hey Group, Today we gonna discuss Soapsuds tool. Soapsuds is shipped with .Net FrameWork and is used by .Net remoting Client Applications to generate xml schema,proxy class or assembly for their HTTP Remoting Server. Client App can use this proxy class or the assembly as a reference to the...more >>

Hi, I am using Windows 2003 Server. The VPN works fine, but I want to FTP through the VPN so the connection is encrypted. The problem is each of my IIS sites has a real Internet address specified, w.x.y.z. So when the VPN comes up using a private IP, I can't connect to any of the FTP sites u...more >>

I'm profiling my (fairly complex) application and discovered that nearly half the time spent is inside of Regex.IsMatch. Diving a little deeper, it seems that the main culprit is a bazillion calls to ToLower inside of the Regex code. RegexRunner is called 200,000 times in the test run, res...more >>

Hi, I am currently working on a C# numerics library (Sharp3D.Math - http://www.ekampf.com/Sharp3D.Math/) and I decided to test the performance of generic types to see if they're worth the effort. I tested performance of a 4x4 matrix multiply operation, the solution on how to use numerics wit...more >>

Hey Group, Today we look in to creating software digital certificates but we take a plunge in that we will look at certain aspects of Crytography. Cryptography is about keys for encryption. These keys can be symmeteric or asymmetric. When we say symmetric keys what we mean is that the same k...more >>

I'm trying to run volume testing on a .NET site using ACT. We modified the script per MSDN article (parse the response/encode view state manually). I still get authentication failed - invalid viewstate messages. Any suggestions? -- JSmith...more >>

Hi, I run a fairly straigt-forward application that uses SQL Server database. One of the modules is runs as a batch for a few hours. After a few times I got a System.OutOfMemoryException, I've started calling GC.Collect after each sub task has ended. I monitored the application via a ".Net ...more >>

Can anybody tell me what is the quickest way )most efficient) method of performing comparisons in vb.net? I'm making modifications to an asp.Net / vb.net application developed by someone else. The code base is loaded with nested if statements all doing string comparisons. The research tha...more >>

I've read many items about looping and performance issue on how you use loops. I was bringing this up with other co-workers and there was a slight dispute. I made a test example, and in most cases, it proved what I have come to understand, and in some it surprised me. As far as I understand...more >>

As my web app in IIS always face request queue up due to lengthy requests. And finally my web app will not response and totally dead. Any methods I can solve this problem? Also, any article talks about how to tweak the setting in IIS and machine.config? Thanks, Dicky ...more >>

Hi, Once a dataset is populated from DataAdapter, I want to release the memory acquired by dataSet object. So I call oDataSet.Dispose(). But it doesnot disposes the internal objects like Datatable/dataColumn. Should I have to call Dispose() method for these internal objects explicitely? OR ...more >>

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnservice/html/service07222003.asp For the article above, does anyone know it's common to implement the solution in a heavy server? any other method can solve the problem raised in the article? Thanks, Dicky ...more >>

I try to serialize a dataset with the BinaryFormatter. The size of the dataset is about 23mb. When i call the serialise method of the BinaryFormatter, the memory used by my process goes from 51500k to 256736k as reported by the task manager and there is nothing i can do to reclaim this mem...more >>

Hi there, We have a web application handling thousands of requests per seconds reading sql server data which is heavily updated. We are generally experiencing no performance problems. On some occasions we get an increase of the traffic of about 15% for short periods. In this case we observ...more >>

Hi Guys, Today we will discuss Ngen.exe and then there are some questions regarding Ngen which ahve always bothered me. I have managed to get answers to them ..... please read thru and let me know your answers to them ... coz I am sure these questions must have bothered u also. Lets start...more >>

..Net is required to run Norton Ghost so, 2 days ago, subsequent to a Norton Ghost 9.0 install I installed .Net along with it's service pack. I use a linksys router (wrt54gs) for internet, file and print sharing and noticed a slowdown in throughput internet speed immediately. Eventually, after...more >>

Hello everybody, Does anybody know some tips regarding the performance of weak references vs. strong references? Thanks, Jamal ...more >>

Hey Guys, Today we are going to look at Code Access Security. Code access security is a feature of .NET that manages code depending on its trust level. If the CLS trusts the code enough to allow it ro run then it will execute, the code execution depends on the permission provided to the ass...more >>

Hi guys, for a while now, we've been flirting with the idea of having a single component in our app that handles all the plumbing for our Db calls ( creating connections, Commands & Parametes etc. ) through an xml definition of each Db call. For instance, a call to a Stored Procedure would ...more >>

Hi, I have web client application and web server application. The client will send remoting request to the server. In a normal condition, the client app runs smoothly. But sometimes, the client will request queue up due to too many requests from users, and that requests will trigger remoting s...more >>

We have an application thats consuming 260~280MB (according to task manager) on our webservers and I'm trying to investigate why. The performance monitor says the heap size is 240MB, and generation 2 objects are consuming 98~99% of the heap (238MB). Using cdb, I created a dump and saved it an...more >>

Hi, I've got an application, which uses a lot of MS technologies (COM, ATL, MFC, VB, C#). Now I've got the problem that the memory overhead of this application (private bytes) increased dramatically when I introduced managed code. I have to track down the problem. So I'm searching for a memo...more >>

Hi Ng Hope this is the right group to place my question. I have a simple VS2003 vb.net application, with 2 data grids and 2 combo boxes on my UI. Using ADO to fill the grid and boxes. Everything works fine, but suddenly after I have done the build and try to run the program ( F5) the UI fl...more >>