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• springboard takes too much CPU

  - by tbarbe

  Is there a way to increase the application priority for the CPU on iPhone? I notice that SpringBoard takes up too much CPU at times causing some fluctuation in performance on the device.

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• Loading css rules dynamically in Webkit (Safari/Chrome)

  - by Patrick

  Hi all, I currently have issues in Webkit(Safari and Chrome) were I try to load dynamically (innerHTML) some html into a div, the html contains css rules (...), after the html gets rendered the style definitions are not loaded (so visually I can tell the styles are not there and also if I search with javascript for them no styles are found). I have tried using a jquery plugin tocssRule(), it works but it is just too slow. Is there another way of getting webkit to load the styles dynamically? Thanks. Patrick

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• C# XPath id() not working?

  - by Iggyhopper

  I'm using C# and I'm stumped. Does it just not support id()? I have a large XML file, about 4-5 of them at ~400kb, so I need some speed and performance wherever I can get it. I use XmlDocument.SelectSingleNode("id('blahblahblah')") and it doesn't get the node by id. Am I going crazy or is it that C# XPath just doesn't support id()?

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• Concise way to getattr() and use it if not None in Python

  - by MTsoul

  I am finding myself doing the following a bit too often: attr = getattr(obj, 'attr', None) if attr is not None: attr() # Do something, either attr(), or func(attr), or whatever else: # Do something else Is there a more pythonic way of writing that? Is this better? (At least not in performance, IMO.) try: obj.attr() # or whatever except AttributeError: # Do something else

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• How can I figure out if an ASP.NET application contains 32bit code/component

  - by timeitquery

  We have an ASP.NET 3.5 application which we need to run on 64bit, but when we do the performance is worst than when we enable 32 bit on the App Pool. It seems like there is something we use in the project which requires 32 bit, but we cannot find what.

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• Best approach to write huge xml data to file?

  - by Kayes

  Hi. I'm currently exporting a database table with huge data (100000+ records) into an xml file using XmlTextWriter class and I'm writing directly to a file on the physical drive. _XmlTextWriterObject = new XmlTextWriter(_xmlFilePath, null); While my code runs ok, my question is that is it the best approach? Or should I write the whole xml in memory stream first and then write the xml document in physical file from memory stream? And what are the effects on memory/ performance in both cases?

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• Is 'epoll' the essential reason that Tornadoweb(or Nginx) is so fast?

  - by Mickey Shine

  Tornadoweb and Nginx are popular web servers for the moment and many benchmarkings show that they have a better performance than Apache under certain circumstances. So my question is: Is 'epoll' the most essential reason that make them so fast? And what can I learn from that if I want to write a good socket server?

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• mean and variance of image in single pass

  - by ajith

  hi everyone,am trying to calculate mean and variance using 3X3 window over image(hXw) in opencv...here is my code...is there any accuracy issues with this??or is there any other efficient method to do it in one pass.? int pi,a,b; for(i=1;i

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• Branching Strategies

  - by Craig H

  The company I work for is starting to have issues with their current branching model, and I was wondering what different kinds of branching strategies the community has been exposed to? Are there any good ones for different situations? What does your company use? What are the advantages and disadvantages of them?

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• When and where do you put type annotations in Clojure code?

  - by Michiel Borkent

  When and where do you put type annotations in Clojure code? Obviously when performance counts. But are there rules by which you can live of when (only when doing Java Interop?) and where to add them (function definition arguments)?

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• Fastest way to read every 30th byte of large binary file?

  - by timmerk

  What is the fastest way to read every 30th byte of a large binary file (2-3 GB)? I've read there are performance problems with fseek because of I/O buffers, but I don't want to read 2-3 GB of data into memory before grabbing every 30th byte either.

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• Ruby on Rails Drawbacks

  - by Shay Friedman

  Ruby on Rails is maybe the most praised web development framework exist. There are tons of reasons for that, but every framework, even the best of its kind, has its drawbacks. I'd like to know the most common problems you run into when developing Ruby on Rails applications and the issues you often struggle with.

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• When should I use temporary variables?

  - by Kyle

  Specifically, I'm wondering which of these I should write: shared_ptr<GuiContextMenu> subMenu = items[j].subMenu.lock(); if (subMenu) subMenu->setVisible(false); or: if (items[j].subMenu.lock() items[j].subMenu.lock()->setVisible(false); I am not required to follow any style guidelines. After optimization, I don't think either choice makes a difference in performance. What is generally the preferred style and why?

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• WCF v.s. legacy ASP.Net Web Services

  - by George2

  Duplicate: although this is a good discussion, this is a duplicate of Web Services — WCF vs. Standard. Please consider adding any new information to the earlier question and closing this one. Could anyone recommend me some documents to describe why WCF is better than legacy ASP.Net web services? I am especially interested in performance and security. Thanks!

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• Dictionary vs ArrayList

  - by ManojTrek

  While Adding the data into the collection, which is better practice to use, and what is performance Impact if we use Dictionary vs ArrayList and Why?

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• nokogiri vs hpricot?

  - by roshan

  Which one would you choose? My important attributes are (not in order) Support & Future enhancements Community & general knowledge base (on the Internet) Comprehensive (i.e proven to parse a wide range of *.*ml pages) Performance Memory Footprint (runtime, not the code-base)

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• Is DateTime.ParseExact() faster than DateTime.Parse()

  - by Nassign

  I would like to know if ParseExact is faster than Parse. I think that it should be ParseExact since you already gave the format but I also think all the checking for the Culture info would slow it down. Does microsoft say in any document on performance difference between the two. The format to be used is a generic 'yyyy/MM/dd' format .

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• Optimal pixel format for drawing on iPhone?

  - by Felixyz

  Pretty simple question: when doing some pretty intense drawing with CoreGraphics on the iPhone, how can I specify the pixel format to get optimal performance? Is the format that I get from the context via UIGraphicsGetCurrentContext per definition the best one? I know that RGB565 is supposed to be the fastest to use in OpenGL. Does that go for CoreGraphics as well? General advice?

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• Javascript AJAX function returns undefined instead of true / false

  - by Josh K

  I have a function that issues an AJAX call (via jQuery). In the complete section I have a function that says: complete: function(XMLHttpRequest, textStatus) { if(textStatus == "success") { return(true); } else { return(false); } } However, if I call this like so: if(callajax()) { // Do something } else { // Something else } The first is never called. If I put an alert(textStatus) in the complete function I get true, but not before that function returns undefined.

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• Limit on amount of generic parameters in .NET?

  - by thr

  Is there a limit on the amount of generic parameters you can have on a type in .NET? Either hard limit (like 32) or a soft limit (where it somehow effects performance to much, etc.) What I'm referring to is: class Foo<T0, T2, T3, T4, etc.> { }

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• Which chemical stimulation do you require while coding?

  - by Ryan

  Whatever it be, caffeine, tobacco, whatever, list your programming performance enhancing drug of choice. Do you feel like you NEED it to be most effective at your work? Vote up someone if they answered the same as you.

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• Use of With Clause in Sql Server

  - by hgulyan

  Hi friends, please, help me understand how's that working. Does it really give me some performance boost or it just helps to make more readable scripts? Thanks.

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• Why Django automatically adds slash after url that ends with ".htm" and doesn't when url ends with "

  - by user118657

  I have a problem that Django automatically adds slash to urls that ends with ".htm" Url like: http://127.0.0.1:8080/js/tiny_mce/themes/advanced/link.htm becomes: http://127.0.0.1:8080/js/tiny_mce/themes/advanced/link.htm/ But if I rename "link.htm" to "link.html" then no problem happens. Where could be the issues? Thanks.

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• How do I replicate a table to all nodes in a DB2 DPF instance?

  - by brianegge

  I have a dpf instance with a few large tables, which are partitioned, and a number of small tables which are not. I'd like the small table to fully exist on each node of the partition for performance reasons. How do I make db2 fully replicate these small tables to each node?

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• Comparing Flash, HTML, Silverlight, X3D and Unity 3d

  - by Amira Elsayed

  I have to prepare a comparison between the following technologies to present it to my Project Manager, but I fell that I'm lost, so if any one can help I will be thankful I want to compare between them in the following areas: the support of online video streaming the budget of using each one Learning Time will be needed to learn the technology Which one is the standard and will target a lot of users The support if I found any problem Bugs and security issues connection to DB, SOA and web services supporting of multi player

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