How much of a performance hit will running everything over TLS do to my server? I would assume this is completely ignorable in this day and age? I heard once that servers today could encrypt gigabytes of data per second, is that true? And if so, is it linearly scalable so that if top speed is 10GB/second, encrypting 1GB would take 0.1 se...
More than about LINQ to [insert your favorite provider here], this question is about searching or filtering in-memory collections. I know LINQ (or searching/filtering extension methods) works in objects implementing IEnumerable or IEnumerable<T>. The question is: because of the nature of enumeration, is every query complexity at least ...
Is there any C#/F# performance comparison available on web to show proper usage of new F# language? ...
Problem: Ajax suggest-search on [n] ingredients in recipes. That is: match recipes against multiple ingredients. For instance: SELECT Recipes using "flower", "salt" would produce: "Pizza", "Bread", "Saltwater" and so forth. Tables: Ingredients [ IngredientsID INT [PK], IngredientsName VARCHAR ] Recipes [ RecipesID INT [P...
I need to do some performance benchmarks on .NET programs (C#) in Windows, but I haven't done benchmarking much in the Windows world. I've looked into using the Windows 2000/XP Performance monitor with custom counters for this, but I don't think this is quite what I want. Are there any good system facilities for this in Windows XP, or ...
My understanding is that C/C++ produces native code to run on a particular machine architecture. Conversely, languages like Java and C# run on top of a virtual machine which abstracts away the native architecture. Logically it would seem impossible for Java or C# to match the speed of C++ because of this intermediate step, however I've...
I understand that IronPython is an implementation of Python on the .NET platform just like IronRuby is an implementation of Ruby and F# is more or less OCaml. What I can't seem to grasp is whether these languages perform closer to their "ancestors" or closer to something like C# in terms of speed. For example, is IronPython somehow "...
I have a home-spun 2000 lines VBScript script, that has become progressively slow with each additional code I add. It was created as a private debugging aid and now that it has become really useful. I want to polish it and ship it along with our product. I thought I could speed it up by compiling it and making it an EXE. Furthermore I w...
Can anyone recommend some useful performance analysis tools for PHP scripts? Anything that could help me find problematic or unusually slow blocks of code, details about execution time, etc. would be really helpful. I know there are tools out there, but I'm wondering what people recommend as being the most useful and well-designed. ...
I'm curious if anyone has done any performance comparisons with any or all of the main players in the .NET ORM space. Specifically I'm interested in comparisons between the following: Linq to SQL NHibernate LLBL Gen Entity Framework Though it seems people don't really consider Linq to SQL a true ORM, I am still including it in this l...
From time to time I read that Fortran is or can be faster then C for heavy calculations. Is that really true? I must admit that I hardly know Fortran, but the Fortran code I have seen so far did not show that the language has features that C doesn't have. If it is true, please tell me why. Please don't tell me what languages or libs are...
I'm looking for a fixed-point standard to use for financial data, do you know any that is worth trying? Do you have any experience on the performance of that hand-made fixed-point classes? ...
I have a table of "items", and a table of "itemkeywords". When a user searches for a keyword, I want to give him one page of results plus the total number of results. What I'm doing currently is (for a user that searches "a b c": SELECT DISTINCT {fields I want} FROM itemkeywords JOIN items WHERE (keyword = 'a' or keyword='b' o...
First, I'd like to establish the acceptable end-to-end latency for a real-time system in the financial world is less than 200ms. Okay, here's what I'm after. In the design of real-time systems, there are "design patterns" (or techniques) that will increase the performance (i.e. reduce processing time, improve scalability, etc). An examp...
So, one commonly heard comment when talking about performance is that you write your code with whatever language gets the job done fastest. If performance in specific areas is a problem, then rewrite those bits in C/C++. But, what if you're starting with a native C++ app? What options do you have if you want to write the easy bits, or r...
From what I've seen in the past, StackOverflow seems to like programming challenges, such as the fast char to string exercise problem which got dozens of responses. This is an optimization challenge: take a very simple function and see if you can come up with a smarter way of doing it. I've had a function that I've wanted to further op...
Is it possible to gather performance statistics programmatically from inside a WCF application? For example, the number of connections open or requests received. ...
The rails scirpt script/performance/request require a session script, what is the best way to generate this session script? ...
I'm in the process of writing a Java 2D game. I'm using the built-in Java 2D drawing libraries, drawing on a Graphics2D I acquire from a BufferStrategy from a Canvas in a JFrame (which is sometimes full-screened). The BufferStrategy is double-buffered. Repainting is done actively, via a timer. I'm having some performance issues though, e...
I am using wxWidgets and Visual C++ to create functionality similar to using Unix "tail -f" with rich formatting (colors, fonts, images) in a GUI. I am targeting both wxMSW and wxMAC. The obvious answer is to use wxTextCtrl with wxTE_RICH, using calls to wxTextCtrl::SetDefaultStyle() and wxTextCtrl::WriteText(). However, on my 3ghz ...