Is there a performance issue with using & to do string concatenation versus using the String.Concat method? What is the best practice for doing string concatenation in VB.NET?...more >>

Hi, I have a .NET server application (GUI interface in C#). It has been working well until I have to load almost 1GB data into the memory recently. I am running Win2k Server with 2GB RAM and dual processor with hyperthreading. The problem is the data will be loaded fine during the initialization ...more >>

Hi there, I was testing performance of the some classes recently and spotted strange behaviour: simple loop executes faster when compiled under debug configuration than release... Take a look: DateTime before; DateTime after; TimeSpan total; before = DateTime.Now; int j; for(int i=1; ...more >>

Hi Group, I have a huge one GB file to do some processing (sorting) using .Net Framework (C-Sharp language). What is the best efficent way to do this. I have tried opening the file and reading it in blocks and do the sorting, and mergining the file, but its taking huge time more than 30 mins...more >>

I am running an ACT test to stress my web application. I have created my script, which seems to work fine. I want to run with 500 concurrent users, but when I do this it seems the test center sends all 500 requests at once, this is causing many of the connections to fail. What I would like...more >>

Is there any way to mark functions for optimization or is the only way for that to use something like an external preprozessor. Say e.g. i have a verrry simple function like... bool SetValueAndFire(string name, object value, EventHandler handler) { if(base.GetValue(name).Equals(value)) ...more >>

hi, i have a big database interaction class with many CRUD operations in it. We create instance of the class, and call a single function. Something inside me tells i can gain a performance boost if i convert this database interaction class to static (Shared in VisualBasic). Is it true? If it ...more >>

Hi, I am trying to figure out how GC.Collect(2) works. here is what I did. I created a windows form with a button. on click of button, i have this simple code. object obj = new object(); GC.Collect(2); return; before I press the button, I check these values in perfmon. (dont worry ...more >>

on an order entry form i have listbox showing customer lisitng @ approx 100kb and also its corresponding viewstate. this has a very neg impact on perf as each page load is about 300kb and takes several seconds. my Q is what alternative do i've, i dont mind taking the hit once, but since the...more >>

Hi! I have a very strange problem, I know I have to expect that first time loading of a .NET application will take some extra time, but how can I open a Splash during that time?It takes at least 5 seconds until my sub Main process first line, I tried to put in cache the assemblies during regis...more >>

Why is the BinaryWriter.Write7BitEncodedInt a protected method? I wish to use this functionality out of the box, yet I must override the BinaryWriter class to do so, just curious why Microsoft? Thanks in advance. -Chris ...more >>

Hello all, I'm trying to make a 3D transformation with image data. For the 3rd 1 D transformation I have to jump in a 12Gbyte file, to get the data for the transformation. The jumpimg in the file cost a lot of time. I am doing the filehandling with help of the filestream and binaryreader class...more >>

I wish to use a BinaryWriter on top of a BufferedStream on top of a NetworkStream which is of course on a Socket. When I call the Flush method of the BinaryWriter I know that this should flush any data in the BinaryWriter's buffer, however does the BinaryWriter's Flush method call the underl...more >>

Hello everybody We are currently writting a small app that will be delivered on an Informix DB and a Sql Server DB. We will be doing some performance check pretty soon for both databases. Is anybody using something else other than the IBM informix provider, and the regular SqlServer provide...more >>

Our .Net team have been pondering about using keyword. We are using streams FileStream and BufferedStream. We use using keyword at FileStream, and not BufferedStream which wraps FileStream. So bunch of people said what if exception occurs buffered stream is not closed. My Argument is over ...more >>

I have a class vaiable of type ArrayList, I would like the varaible never to be collcted by the GC, at some points however I need to call the clear method on the variable. Am I correct in thinking that the calling clear on this varaible, makes the variable elegable for GC to dispose of it? And...more >>

Hi, I am trying to close a socket on which I am listening. I know that this will cause the ObjectDisposedException to be thrown. The problem is that it takes 4-5 seconds for it to be thrown. Is this _normal_ or could it be due to some other issue? Sample code for this is below. try { So...more >>

I have a app that listens on a TCP Socket and sends all the incoming messages to a Queue. There is another thread that does a Receive on the MSMQ and so block waits until a message arrives. The Socket also does a Receive and block waits until a message arrives. Which is better - a blocking Recei...more >>

Hi i need to copy a large dataset to an other database I also wrote the dataset to an XML file, with a very huge performace difference. Any suggestions how to improve the write to the database? Result for xml fine < 1 second, and to database 1 minute 52 My source: // Source database ...more >>

Hi. I'm working with an app that uses exceptions for control flow. These are code blocks where exceptions are thrown/caught regularly. A couple hundred exceptions occur per hour and they're caught close to the point of origination. I'm trying to decide whether to refactor... What is the cos...more >>

The CLR Profiler tool always crashes part-way through when I use it to profile an app I'm developing. Outside of CLR Profiler, the app normally runs for about 20 minutes doing heavy text processing. With CLR Profiler it runs for about 2-5 minutes and then triggers an assert dialog in the underly...more >>

Hi, I have an application that uses an api to receive call backs on= the main UI thread=2E The application also has a system timer= that will at a given time interval ascyncronously call a= calculate method and then update the display of the form=2E However each time the garbage collect...more >>

Hi, I've some questions regarding rebasing. How does the process of ngen work which sets the base address? I observed that some native images have got the same base address. Will this harm the startup performance? I read an article which mandates that choosing the appriate base address can l...more >>

I support a web server farm of about 80 machines, of which 35 are in Production at any given time. Machines are running Windows 2000 Advanced Server with IIS 5. All 80 machines are configured exactly the same in regards to software, yet only one machine repeatedly shows queuing on the performanc...more >>

HI. I've just started working with VB.Net to put a wrapper around an XML processing application. This application bascially presents a user with an iterative loop of - load XML - Transform for display to user - collect user amendments to XML - update XML and round we go again. I am u...more >>

Anynone? "microsoft.news" <msuot@dmod.com> wrote in message news:... > Hi all, > > Here is the example i would like everyone to concentrate on: > > static void Main(string[] args) > { > System.Collections.ArrayList list = new System.Collections.ArrayList(); > System.TimeSpan tenMins = ...more >>

I have a server application that runs continuously on dotnet V1.1. It gradually uses memory until it reaches 600M to 700M and then it either hangs, or it starts returning memory errors. I have a call to GC.GetTotalMemory(true) in the code and it never returns more than 6M. Perfmon reports almost ...more >>

Microsoft, Can I make a request for a newsgroup specific to MSIL? I have taken great interest in MSIL and have done a lot of reading into MSIL, and written, compiled and tested with success a few il programs. I'm sure this is a topic of interest to many people, as it is at the heart of .Net....more >>

I have a doubt regarding the extraction of CPU % usage of a particular process at a particular point of time using the .NET framework. I see that there are only methods for extracting the total CPU usage time, privileged CPU usage time and user CPU usage time. And they are all in DateTime format. I ...more >>

We are building an application that must be able to handle up to 60000 simultaneous users. Therefore I would like to know how much memory each of the users session object uses. Is there an easy way to measure the size of each Session object? ...more >>

Hi All, Has anyone done any benchmarks with Methodbase.GetCurrentMethod? I would like to get an idea on the kind of overhead this imposes on the code. Basically, what I'm doing is passing the CurrentMethod to a centralised ExceptionHandler and want to get the name of the function that threw ...more >>