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• What is the best epoll/kqueue/select equvalient on Windows?

  - by blackwing

  What is Windows' best I/O event notification facility? By best I mean something that ... doesn't have a limit on number of input file descriptors works on all file descriptors (disk files, sockets, ...) provides various notification modes (edge triggered, limit triggered)

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• What are the benefits of using IronPython over IronRuby or F#?

  - by Aim Kai

  Well aware that DLR is here!! I have recently reading up on all of these and was wondering if there were any specific benefits of using one language over another? For example performance benefits! and available functionality through standard libaries!!

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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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• Which design pattern should be used to create an emulator?

  - by Facon

  I have programmed an emulator, but I have some doubts about how to organizate it properly, because, I see that it has some problems about classes connection (CPU <- Machine Board). For example: I/O ports, interruptions, communication between two or more CPU, etc. I need for the emulator to has the best performance and good understanding of the code. PD: Sorry for my bad English. EDITED - Asking for multiple patterns.

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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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• SQL Server Backup to a Remote Server

  - by J Harley

  Good Afternoon, I realise there is a command: BACKUP DATABASE [DB Name] TO DISK [PATH] Is it possible too backup to a remote location? - E.G. the web server rather than the database server? Many Thanks, Joel

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• Check whether a folder is a local or a network resource in .NET

  - by rwmnau

  Is there a quick way to check whether a path I have is on a local disk or somewhere on the network? I can't just check to see if it's a drive letter vs. UNC, because that would incorrectly identify mapped drives as local. I assumed it would be a boolean in the DirectoryInfo object, but it appears that it's not. I've found classic VB code to do this check (through an API), but nothing for .NET so far.

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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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• Good TFS Hosting Provider

  - by JonnyD

  I'm looking for a good 3rd party host for Team Foundation Server. Have any of you had good or bad experiences in the past? Will be working on a small .NET project with several other guys in different locations. Are there any performance problems or any other "gotchas" with 3rd party hosting?

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• What is the best way to create continuously looping background in iPhone SDK ?

  - by catpad

  What is the best way to create a continuously looping background using iPhone SDK so that it seems the foreground object is in perpetual motion ? I have a background image which I want to move continuously at a given speed from right to left and seamlessly start displaying the beginning of the image when its end is reached. What is the best, most efficient way to do it to avoid any jumps and get optimal performance ?

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• Where to go from PHP?

  - by dabito

  I'm a seasoned PHP programmer and I really like the way it works and find it very fun to work with (performance could be improved and some functions renamed, but nothing too serious). However, I took a java seminar and now Im very interested in using GWT for upcomming projects, although I think the learning curve can be steep. Should I really go through with this change (PHP JAVA)? Where to begin?

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• Why do you have to mark a class with the attribute [serializable] ?

  - by Blankman

  Seeing as you can convert any document to a byte array and save it to disk, and then rebuild the file to its original form (as long as you have meta data for its filename etc.). Why do you have to mark a class with [Serializable] etc? Is that just the same idea, "meta data" type information so when you cast the object to its class things are mapped properly?

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• What are the major differences between NET Frameworks 3.5 and 4.0?

  - by Junior Mayhé

  Hi Guys Is there any real great (really good) difference between NET Framework 3.5 and NET Framework 4.0? Perhaps something regarding performance? thank you

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• How many max constants can i define in PHP ?

  - by WarDoGG

  My site is having around 100+ constants defined and this can potentially reach 200. I'm using define() for defining constant. Will this cause a performance hit ? How many max constants can i define in PHP ?

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• Should I consider Erlang for web mvc?

  - by gotts

  Can I do that? I'm afraid that this can be an overkill and eventually I'll end up with much less productivity than with traditional stack like Ruby/Python/you name it. I understand that you will start with much lower productivity if you start to work with new technology but .. is it potentially worth trying and finally switch to Erlang as the only tool for web development and all the backend stuff. Or is Erlang more suitable for only some high performance backend tasks?

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• Why is multitasking not supported on the iPhone ?

  - by srikanth rongali

  Many people are saying that Apple has restricted it for better performance. If so Apple should increase the size of RAM to support multitasking. So Apple is not allowing it. Others say that Cocoa Touch applications can't be multitasking as the iPhone has only one window and views on it. I can not understand which is the actual reason for this ? Please clarify me.

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• OpenCL or CUDA Which way to go?

  - by holydiver

  I'm investigating ways of using GPU in order to process streaming data. I had two choices but couldn't decide which way to go? My criterias are as below: Ease of use.(good API) Community and Documentation. Performance Future I'll code in C and C++.

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• has anyone produced an in-memory GIT repository?

  - by Andrew Matthews

  I would like to be able to take advantage of the benefits of GIT (and its workflows), but without the cost of disk access - I just would like to leverage the distributed revision control capabilities of GIT to produce something like a hybrid of memcached and GIT. (preferably in .NET) Is there such a beast out there?

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• find and replace tokens in javascript

  - by Sourabh

  Hello, I have to do something like this string = " this is a good example to show" search = array {this,good,show} find and replace them with a token like string = " {1} is a {2} example to {3}" (order is intact) the string will undergo some processing and then string = " {1} is a {2} numbers to {3}" (order is intact) tokens are again replaced back to the string likem so that the string becomes string = " this is a good number to show" How should it be implemented so that the process is done at high performance ? Thanks in advance.

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• How to write binary data to a usb flash drive or floppy?

  - by Alon

  Hi I need to write my own binary raw data to a flash drive (like a disk on key) or a floppy using C#. The result will be my custom file system from my program. Any ideas? Thank you.

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• Best way to display a background with a pattern in an iPhone/iPad app

  - by Dr Dork

  Here's an example of the type of background image I'm talking about... Clearly, there's a pattern in it. My question is, if this were an iPad app and the background image was twice the size, would there be any significant benefits to taking advantage of this pattern by tiling the image? Or would it really make no difference in terms of performance and just be easier to load the entire image into a UIImageView? Thanks in advance for all your wisdom!

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• Encrypted SQLite database in Qt

  - by Jake Petroules

  Is it possible to work with an encrypted SQLite database directly in Qt? Or, do I have to read it entirely into memory, decrypt in memory, do work, encrypt in memory, write to disk?

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• Acquiring drive names (as opposed to drive letters) in Java

  - by Mattijs

  Hi, On my Windows machine, my main hard drive has the letter C: and the name "Local disk". To list the drive letters in Java on Windows, the File object has the static listRoots() method. But I can't find a way to acquire the drive names (as opposed to the drive letters) on Windows. Has anyone tried this before? Thanks, Mattijs

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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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