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• Is it OK to have multiple html, head, and body elements in single page

  - by nicknisi

  I have multiple pages being pulled together into a single page. Some of these individual pages have their own html, head, and body elements. Is it detrimental to the performance of the page to have these? It seems that the DOM is correct (only has a single of each element) in FireBug.

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• where should I do the calculating stuff,PHP or Mysql?

  - by SpawnCxy

  I've been doing a lot of calculating stuff nowadays.Usually I prefer to do this job in PHP rather than Mysql though I know PHP is not good at this cuz I thought mysql may be worse.But I found some performance problem :some pages were loaded so slowly that 30 seconds' timelimit is not enough for them!So I wonder which is the better practice to do the calculations,and any princles for that?Suggestions would be appreciated.

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• Better to use an OR or an AND when checking for NULLs in C if statements?

  - by Crazy Chenz

  Came across a line in OpenSSL that made me do a double take... if (!*pos) return NULL; if (!*pos || ((*pos)->flags == FLAGS)) return blah; Is there a (performance/security/concurrecy) difference in doing that instead of: if (!*pos) return NULL; if (*pos && ((*pos)->flags == FLAGS)) return blah; Thanks, Chenz

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• Regular expression (PCRE) for url matching

  - by zerkms

  The input: we get some plain text as input string and we have to highlighight all urls there with {url For some time i've used regex taken from http://flanders.co.nz/2009/11/08/a-good-url-regular-expression-repost/, which i modified several times, but it's built for another issue - to check whether the whole input string is an url or no. So, what regex do you use in such issues?

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• popup login page reload

  - by Mahmoude Elghandour

  i use fancybox for popup the login page jQuery(function () { jQuery(".spop").fancybox({ 'transitionIn': 'elastic', 'transitionOut': 'elastic', 'speedIn': 400, 'speedOut': 200, 'width': 320, 'height': 315, 'padding': 0, 'margin': 0, 'titleShow': false, 'scrolling': 'no', 'type': 'iframe', 'overlayShow': true, 'onClosed': function () { parent.location.reload(true); } }); as you see i use event 'onClosed': function () { parent.location.reload(true); but i need to do this event but under some condition if the user click close i need fancebox don't reload you can find this issues in this link http://www.aqar4me.com/rent.aspx

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• Is it safe to modify CCK tables by hand?

  - by LanguaFlash

  I'm not intimately familiar with CCK but I have a one-time custom setup and know that I could get some performance gains if I created indexes and changed the field type and length of some of the fields in my CCK table. Is it save to modify this table at all or will I end up destroying something in the process? Thanks

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• WPF Label vs TextBlock in Border ?

  - by PaN1C_Showt1Me

  If you know that you have to show tens of texts with a border, would you decide for a Label (which is much complex and resources consuming) or a TextBlock in a Border? . The performance aspect is the one interesting for me now. Thank you !

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• Object Oriented vs Relational Databases

  - by Dan

  Objects oriented databases seem like a really cool idea to me, no need to worry about mapping your domain model to your database model, no messing around with sql or ORM tools. The way I understand it, relational DBs offer some advantages when there is massive amounts of data, and searching an indexing need to be done. To my mind 99% of websites are not massive, and enterprise issues never need to be thought about, so why arn't OO DBs more widely used?

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• Target Framework Mismatch

  - by Si Keep

  When adding a reference to a project I sometimes see the message... "The Target Framework version for the project is higher than the current project Target Framework version. Would you like to add this reference to your project anyway?" I understand what the message is indicating but can anyone explain what issues might arise from saying 'Yes'?

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• Is it a good practice to always use smart pointers ?

  - by Dony Borris

  Hi, I find smart pointers to be a lot more comfortable than raw pointers. So is it a good idea to always use smart pointers? ( Please note that I am from Java background and hence don't much like the idea of explicit memory management. So unless there are some serious performance issues with smart pointers, I'd like to stick with them. ) Any advice would be greatly appreciated. Thanks.

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• Multi core processors... are they really needed?

  - by user69514

  What things are multi-core processors needed for? I mean what type of things benefit from using multi-core ? Also are there anythings that suffer in performance for using multi-core... ie. they perform better using a single core processor?

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• Any Javascript optimization benchmarks?

  - by int3

  I watched Nicholas Zakas' talk, Speed up your Javascript, with some interest. I liked how he benchmarked the various performance improvements created by various optimization techniques, e.g. reducing calls to deeply nested objects, changing loops to count down instead of up, etc. I would like to run these benchmarks myself though, to see exactly how our current browsers are faring. I guess it wouldn't be too difficult to cook up some timed loops, but I'd like to know if there are any existing implementations out there.

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• How can I set a default sort for tables in PHPMyAdmin (i.e. always "Primary key - Descending")

  - by jeremyclarke

  Even though its obnoxious in a lot of ways I use PHPMyAdmin all the time to debug database issues while writing PHP. By default it sorts tables by primary key ascending. 99% of the time I would rather have the newest data (my test data) shown at the top by default rather than the useless first few records ever saved. Is there a way to configure PHPMyAdmin to show the newest records by default? To alter similar behavior?

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• How to change executable icon from c# code? (not my app icon)

  - by flyout

  How can I change *.EXEs icons from c# code (not my main app icon but from that app i want to change the icon of another exe). I eventually would have to change the icons for A LOT of files so I am looking for a fast and good performance way to do it. I have been googling for 30min but all I found is how to set the icon for the app in VS.

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• Check if string is serialized in PHP

  - by Industrial

  Hi everyone, I am in the middle of building a cache layer for the Redis DB to my application and I have come to the point where's it's about to take care of arrays. I wonder if there's any good (high performance!) way of controlling an string to be serialized or not with PHP? Thanks a lot!

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• Using Int32 or what you need

  - by Sir Psycho

  Should you use Int32 in places where you know the value is not going to be higher than 32,767? I'd like to keep memory down, hoever, using casts everywhere just to perform simple arithmetic is getting annoying. short a = 1; short result = a + 1; // Error short result = (short)(a + 1); // works but looks ugly when does lots of times What would be better for overall application performance?

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• Is there any small linux distribution which comes with a complete C devleopment environment

  - by hits_lucky

  Hi, I have installed "Damn Small Linux" on my home computer for doing C development in unix. But the distribution doesn't by default come with the C development environment and I am facing some issues when trying to install the gcc. Is there any other small Linux distribution which by default has the required packages for the C development. And also I don't want additional software which takes up lot of space but still would like to have the graphical environment. Thanks

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• What the best multi-thread application debugger for C++ apps.

  - by Coredumped

  I'm looking for a good multi-thread-aware debugger, capable of showing performance charts of application threads on Linux, don't know if such a thing exists, perhaps as a Eclipse plugin. The idea would be to track per thread memory allocation a CPU usage as well as being able to interrupt a thread and examine its stack trace, local vars, etc. It does not have to be an eclipse plugin or a free tool, do any of you have heard of something similar?

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• what is deadlock in sql server?

  - by VenkatReddy.Ravu

  What is deadlock in sql server and when it arises? What are the issues with deadlock and how to resolve it?

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• JVM hs_err.log not being generated on Linux

  - by halfwarp

  Hello, I'm currently having some issues with a Java application I'm developing. Namely the JVM is crashing with a segfault. I'm trying to locate the hs_err.log file which should contain some helpful info about the issue. However, I can't find this file. I've used find, locate, etc, and nothing. Any ideas on why the log file isn't being generated?

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• What are the fundamental differences between ASP.net and PHP?

  - by palhmbus

  Are there speed differences, performance issues, and what reasons do businesses have when they choose one or the other, is the learning curve steeper for one over the other? Also... are you likely to be paid more using one over the other?

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• In IntelliJ on OS X, how do you clear out all global setting info, licensing etc. (external to any p

  - by kalak451

  I am having some low level issues with IntelliJ on my mac, I really want to just zero everything out and start over. But even after removing the application and re-installing it, IntelliJ still remembers things like what the last project was, what licensing key to use etc. Where is this information stored? And what is the best way to clear it out?

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• What data actually gets cached in InnoDB/MySQL?

  - by ming yeow

  Hi folks, i am trying to optimize performance for my database. My question is - what get cached in the db memory? For example: (table with 2 columns: key (indexed), data (not indexed) updated (not indexed) Select * where updated=20100202 (the db will do a scan - will the scanned rows be kept in memory?) Select * where key = 20 (the db will refer to the index - will the identified rows be kept in memory?)

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• How to build a web based chat application similar to gmail using java at backend logic

  - by manu

  Hii, I want to built a web based chat using j2ee at backend logic.i want to implement the similar way the gmail do,so that performance of application doesnr degrade.please suggest what type of architecture shoul i follow.load of application would be high.

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• Python `if x is not None` or `if not x is None`?

  - by orokusaki

  I've always thought of the if not x is None version to be more clear, but Google's style guide implies (based on this excerpt) that they use if x is not None. Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convention)?* *I'm referring to any singleton, rather than just None. ...to compare singletons like None. Use is or is not.

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