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• Does OpenGL stencil test happen before or after fragment program runs?

  - by david

  When I set glStencilFunc( GL_NEVER, . . . ) effectively disabling all drawing, and then run my [shader-bound] program I get no performance increase over letting the fragment shader run. I thought the stencil test happened before the fragment program. Is that not the case, or at least not guaranteed? Replacing the fragment shader with one that simply writes a constant to gl_FragColor does result in a higher FPS.

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• What is the best way to download files via HTTP using c#

  - by Shamika

  Hi, In one of my application I'm using the WebClient class to download files from a web server. Depending on the web server sometimes the application download millions of documents. It seems to be when there are lot of documents, performance vise the WebClient doesn't scale up well. Also it seems to be the WebClient doesn't immediately close the connection it opened for the WebServer even after it successfully download the particular document. I would like to know what other alternatives I have. Thanks, Shamika

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• Is it reasonable to use OpenGL for desktop applications?

  - by JamesK89

  I've been writing a small desktop gadget-type application that displays scrolling text along the bottom of the screen (Similar to the old CNN news ticker), however the performance of GDI is just unsatisfactory (As high as 8-12% on a quad core and 20% on a single core) even after I've attempted to clean out bottlenecks. I was considering using OpenGL instead to render everything, but I don't know if that is a reasonable option to require users to have hardware acceleration for a tiny app like this. Does anybody have any input on this?

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• CounchDB in Production

  - by NoelAdy

  I have been using CouchDB on some prototype applications and it has been brilliant, very easy to use and extremely quick. I was wondering if anyone has been using it in production and have any views on it's reliability, performance suitability for operational management etc ?? I am considering using it to support a service layer and would make use of its replication functionality. Any comments/experiences would be most welcome.

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• copy and Search Web services

  - by user171523

  We are in the process of integrating ASP.NET Business App with Sharepoint. I have some Design questions. Requirement - From ASP.NET buz application we upload document to Sharepoint Doc Lib 2010 using Web Services. And perform a Search using Serach web service. I would like to know from group are there any disadvantages doing this? Performance etc .. What kind of seacurity consideration i need to be thinking of.

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• Is it bad to explicitly compare against boolean constants?

  - by polygenelubricants

  Is it bad to write: if (b == false) //... while (b != true) //... Is it always better to instead write if (!b) //... while (!b) //... Presumably there is no difference in performance (or is there?), but how do you weigh the explicitness, the conciseness, the clarity, the readability, etc between the two?

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• SQL Images in different tables

  - by Adonis L

  I am storing images in a SQL database , right now I have images being stored in separate tables depending on the object the images belong to, is there any reason ( performance etc..) why I should keep it this way and not store all images in the same table?

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• '/usr/lib/mozilla/plugins/npPluginTest.so' is not an ELF executable for sh

  - by rakesh nair

  I have created NPAPI plugin, which is workig fine on linux where I have created the .so file but when I deployed this plugin on our production device where we have linux environment with limited resources(due to performance constraints) , following error is thrown '/usr/lib/mozilla/plugins/npPluginTest.so' is not an ELF executable for sh FYI:so file created on 32bit linux box. how can I resolve this issue?

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• Trigger action when element is clicked but not when some specific subelements are.

  - by Anant

  I have a div, containing text and a few links. I want to trigger an onclick event, only if the click occurs anywhere in the div, but not on any of the links. What would be the best way (performance wise) to implement this using jQuery? The one I use is $('#div').click(function(){ }); but it disables all the #div a

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• Android emulator is based on QEMU. Can I use KVM with it?

  - by Felix

  My laptop supports hardware virtualization (AMD SVM) and I know that: QEMU can make use of hardware virtualization through KVM; The Android emulator is very much based on QEMU Natural question follows: can I combine the two (Android+KVM) to get improved performance in the emulator?

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• How do I optimize SVN (SVNKit) for commiting big files?

  - by nubela

  Hi, I'm writing a wrapper for SVNKit to be used as a sync tool. And committing a 51mb file is taking a long time and I was wondering if performance of committing/importing can be optimized? What do you guys think?

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• What is the equivalent of REGEXP_SUBSTR in mysql?

  - by KandadaBoggu

  I want to extract a word from a string column of a table. description =========================== abc order_id: 2 xxxx yyy aa mmm order_id: 3 nn kk yw Expected result set order_id =========================== 2 3 Table will at most have 100 rows, text length is ~256 char and column always has one order_id present. So performance is not an issue. In Oracle, I can use REGEXP_SUBSTR for this problem. How would I solve this in MySQL?

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• I think my boss is considering me that i am unfit.

  - by Nasif

  Hi, I think my boss has some negative mark on me, that i am not fir for coding. But my Tech Lead is very happy about my coding and performance. What i do for improving my career in software development area.

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• Does generation of debug information to JSP classes add much to javac execution time?

  - by Rich

  Hi I am looking looking into the options for tweaking the performance of JBoss 5.1.0 and one of the options available to me is to disable the generation of debug information when compiling JSPs. I know that the presence/absence of debug information for the JVM makes no real difference, but does the generation of that debug information add much to compile time? Thanks in advance Richard

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• SSL with external static content server

  - by SirMoreno

  I have a .Net web application that for performance issues gets all the static data (CSS, Images, JS) from an external server that is on different location and different hosting company. I want to enable SSL on my site without the users getting a message: "Page contains both secure and insecure elements" Does this means I’ll have to get two SSL Certificates one for each server? If I want the users to continue getting the static content from the external server what other options do I have? Thanks.

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• What's faster to parse lots of data (5Mb): eval or json?

  - by AlfaTeK

  I want to get, via ajax, a collection of data objects and parse them into JS data. Currently I have 2 choices: - Server returns valid javascript code and then I eval it. - Server returns JSON object and then I eval the json object What is the fastest of these in Firefox? (I only care about the "parsing" performance, not server or data transfer)

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• innerHTML and event delegation

  - by Mark Gerrard

  Hello, I have a containing div that has multiple divs within which is updated every 25ms using innerHTML (for performance reasons). I have tried using event delegation to capture events but nothing I seem to do captures the click event. I think this may be due to the speed that the contents are getting updated. Any ideas would be very welcome. Thanks Mark

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• Drawbacks of Dynamic Query in Sqlserver 2005 ?

  - by KuldipMCA

  I have using the many dynamic Query in my database for the procedures because my filter is not fix so i have taken @filter as parameter and pass in the procedure. Declare @query as varchar(8000) Declare @Filter as varchar(1000) set @query = 'Select * from Person.Address where 1=1 and ' + @Filter exec(@query) Like that my filter contain any Field from the table for comparison. It will affect my performance or not ? is there any alternate way to achieve this type of things

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• SSI or PHP Include()?

  - by Ozzy

  Hi all, basically i am launching a site soon and i predict ALOT of traffic. For scenarios sake, lets say i will have 1m uniques a day. The data will be static but i need to have includes aswell I will only include a html page inside another html page, nothing dynamic (i have my reasons that i wont disclose to keep this simple) My question is, performance wise what is faster or

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• Unfamiliar Javascript Syntax

  - by user1051643

  Long and short of the story is, whilst reading John Resig's blog (specifically http://ejohn.org/blog/javascript-trie-performance-analysis/) I came across a line which makes absolutely no sense to me whatsoever. Essentially it boils down to object = object[key] = something; (this can be found in the first code block of the article I've linked.) This has proven rather difficult to google, so if anyone can offer some insight / a good online resource for me to learn for myself, I'd much appreciate it.

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• Best practices for implementing an Access (2007) application

  - by waanders

  Hello, Where can I find an overview (website) of best practices for implementing an Access (2007) application (with a FE/BE architecture) regarding to security, performance and maintainability? I know about designing tables, queries, forms and so on and I'm a reasonable programmer, but I'm wondering what's the "best" and most efficient way to implement my "application". Thanks in advance for your help.

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• Is ArrayList.size() method cached?

  - by Peterdk

  I was wondering, is the size() method that you can call on a existing ArrayList<T> cached? Or is it preferable in performance critical code that I just store the size() in a local int? I would expect that it is indeed cached, when you don't add/remove items between calls to size(). Am I right?

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• Are there any .net classes/functions that are optimized for multiple cores?

  - by diamandiev

  I know that the developer is supposed to do this himself. But seeing how we are getting cpu's with more and more cores and there are still many developers who do not use multithreading, if we have this functionality built in, it could increase performance dramatically in some scenarios. One particular example where this could be quite useful is in image processing. I doubt that the built in GDI+ classes are multithreaded.

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• Generating db schema from c# class

  - by Niran

  Hi, Is there any other method than nHibernate by wich we can generate db schema from class definition? My classes arn't that complex etc (few one-to-many relations). However I would like to just be able to save my objects in db and recreate schema if needed. I am stuck with .NET 2.0. I am not that particular about performance for this project, I am just lazy to create tables and write save/load code and deel with nHibernate xml. Thanks

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• Google App Engine - Does the non-main version of an App not receive as many resources?

  - by Spines

  I'm doing performance tests on my app engine app. I'm doing it on the non main version of my app. Do loading requests take longer for the non main version of an app?

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