I was given some code in which some of the parameters are pointers, and then the pointers are dereferenced to provide values. I was concerned that the pointer dereferencing would cost cycles, but after looking at a previous StackOverflow article: http://stackoverflow.com/questions/431469/how-expensive-is-it-to-dereference-a-pointer-in-c...
I've two master tables Org & Item and then there's an OrgItem table.I have to fetch ItemCodes for a particular Org. TABLE STRUCTURE: Org ( Id, OrgCode, Name) - Org Master table Item ( Id, ItemCode, Name) - Item Master table OrgItem ( ItemId, OrgId, ItemCode) - Some Org specific ItemCodes Now only some Item's have Org specific Item...
I recently got my home PC upgraded to a quad-core CPU and 64-bit OS. I have some former experience with C/C++ and I'm really "itching" to try exercising some 64-bit CPU capabilities. What's a good "Hello World" type program that demonstrates 64-bit multi-core capabilities by doing some simple things that don't work well at all in 32-bit ...
What should be the best practice to declare the converters: Declare ALL my converters in the app.xaml (i.e. in <Application.Resources/>) so it's available in the entire application. Declare on each Page/Window/ResourceDictionary/DataTemplate etc. at its Resources section, the converters I need on this page. You tell me... That's for ...
We've started compiling both 32- and 64-bit versions of some of our applications. One of the guys on my project is encouraging us to switch all of our 32-bit integers to their 64-bit equivalents, even if the values are guaranteed to fit in a 32-bit space. For example, I've got a value that is guaranteed to never exceed 10,000 which I'm...
I can sort a list using Sort or OrderBy. Which one is faster? Are both working on same algorithm? List<Person> persons = new List<Person>(); persons.Add(new Person("P005", "Janson")); persons.Add(new Person("P002", "Aravind")); persons.Add(new Person("P007", "Kazhal")); 1) persons.Sort((p1,p...
Speed is an important part of choosing a programming language. Apparently, C++ is(for most people) the undoubted ruler when it comes to speed. Yet when asked with evidence to back this up, nothing can be offered. Usual excuses include: It's faster than Java There are so many blogs saying it, it must be true. It's the language I've le...
Sometimes I have to implement an interface or inherit a virtual (MustInherit) that the base method expects an object, whilst I know that the value I will be passing will always be an Integer for example. What should be the best performance from the examples below: Public Sub DoSomething(ByVal obj As Object) 'option 1: Dim x As ...
Hello! I have some computed-columns of two types: Computed columns based on columns in current table (i.e. Price * Tax) Computed columns based on other columnes (i.e. Price * fn_GetTax(OrderId)) Would you say it's better to use these columns in CLR on the client only and then save from the server the calculation and transferring per...
Does the replication system that comes with DB4O work well? Basically I would like to know if anyone has some good numbers on the record throughput of their replication system and if it handles concurrency errors gracefully or not. What is the relative performance difference between SQL Server's merge replication between two SQL server...
Given the following two options: <ContentControl>Content</ContentControl> vs. <ContentControl Content="Content"/> Any performance differences? What would you say is more readable? Conclusion? I'm affraid this question might sound somehow babyish, but how will I know if I won't ask, so I decided to shoot it. Comment me if I chose...
Until now, I have not create any massive applications using ASP.Net. However, I am looking to create an application that has the potential to be very performance intensive. So I am looking for some tools or best practices when it comes to performance. I would like to be able to know how to: See my current performance (good or bad) Vi...
What's better: Private Sub Window_Closed(sender As Object, e As EventArgs) Handles Me.Closed 'Do stuff End Sub Protected Overrides Sub OnClosed(ByVal e As System.EventArgs) MyBase.OnClosed(e) 'Do stuff End Sub I personally think that the second is better, 1st because it doesn't add a handler, and also because the synta...
I have a dataset consisting of roughly 10000 5 field records. I need to be able to retrieve a record based on the value in one field, which is a unique string. Each record will likely only be accessed once or twice. The application accessing the data uses Castle with ActiveRecord, backed onto SQL Server 2005. I recognize that at some p...
I'm working on an application with a 3D viewport which refreshes 30 times a second (or at least tries to render that fast). Unfortunately, the code is complicated enough that simply converting it to test for the performance effect would take quite a while, but the two conditions I'd be comparing are as follows: ObjectToRender p = objec...
In my project I have some code which has been deveoped in VBA and it calls functions from different C# DLLs. currently the performance of the code has been degraded and I am planning to check in which function/dll most of the execution time is spent. Kindly let me if any tool is available to check the same. ...
Hi all, I am trying to benchmark a piece of software that runs on an Intel Pentium with Linux on top of it. The problem is, that I get considerable performance variations during consecutive test runs, when using the RDTSC instruction. Runtimes of exactly the same piece of software vary between 5 million and 10 million clock cycles, so i...
Edit: The Clojure benchmarks are up on the Benchmarks Game. I have made this question community wiki and invite others to keep it updated. Is anyone aware of benchmarks of Clojure's performance? I have done some of my own (although nothing too formal) and it didn't fair too well in comparison to other functional languages (tried...
Hi, IDLE is my favorite Python editor. It offers very nice and intuitive Python shell which is extremely useful for unit-testing and debugging, and a neat debugger. However, code executed under IDLE is insanely slow. By insanely I mean 3 orders of magnitude slow: bash time echo "for i in range(10000): print 'x'," | python Takes 0.0...
sorry i'm a beginner and i can't determine how good a question this is, maybe it sounds utterly obvious to some of you. if our use of these two below is the same which is better? function doSomething ($var1,$var2,..){ ... } OR function doSomething (){ global $var1,$var2,..; ... } by our use I mean that I know that in t...