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• What are the features of dynamic languages (like Ruby or Clojure) which you are missing in Scala?

  - by Alexey

  When you choose to program in dynamic languages you sacrifice performance, some IDE capabilities and compile-type checks in favour of flexibility. So what you practically lose when you choose stytic-typed langauge like Scala (or F#, Haskell, C#) instead of dynamic ones (which has macros or runtime metaprogramming capabilities)?

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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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• 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 can I drag and drop canvases within a Vbox to re-order?

  - by WillyCornbread

  Hi, I'm getting up to speed with Flex and I am looking for any example of implementing a drag and drop re-sort within a vbox container. Basically I have a Vbox that contains a number of canvas's that are full width and 35px high. I want to be able to drag and drop them to re-order within the vbox. Any help is greatly appreciated - thanks, b

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• How to reduce the Bandwidth Consumption in flex app,while its launching application ?

  - by Thirst for Excellence

  Recently i designed one Abode air Chat application, which gets the chat messages from admin-Application(we bApplication), band width consumption is too high while each client launching air application to pull the data from database to my-amf endpoint. in this am using blazeds,Jetty server,simple java classes(not servlets) calling with remote object, Please any one suggest me few techiniques to 1)reduce the bandwidh consumption while sending message to each client from admin 2)minimize the time to pull the data from database while client launching application. Regards, Thirst for Excellence

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• Does ruby on rails have issues with regards to max # of threads the server and serve?

  - by Blankman

  Does ruby on rails have issues with regards to max # of threads the server and serve? i.e. you have to run multiple instances of the server if you reach high load?

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• Most efficient way to animate a path?

  - by mystify

  I have a fullscreen path which consists of about 20 lines. Currently I am animating changes in this path using an NSTimer which frequently calls -setNeedsDisplay. Believe me: Performance sucks absolutely. I slightly remember that there was some better way to animate paths on the iPhone. Some kind of special CA layer. I don't remember anymore it's exact name. Who knows?

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• Component Level Documentation

  - by Jason Summers

  I'm trying to make good on a promise I've made to provide a decent set of documentation for a C# component that I've written. I've done some googling and found templates for software design at high and low level. The problem is that all of the templates seem to be geared towards a complete system design as opposed to individual components and are consequently overkill. Can anyone please point me in the direction of a template geared towards component documentation? Many thanks

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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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• mysql and php: setting config variables on start - impact on server?

  - by andufo

  date_default_timezone_set('America/Guayaquil'); $cnn->execute('SET NAMES utf8'); $cnn->execute('SET GLOBAL time_zone = "-5:00"'); Hi, the code above is run everytime someone enters the website im developing. Does someone know what the impact (in performance) of those commands is?

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• Anyone tried JustCode?

  - by silverArc

  Have you used JustCode? is it better than resharper? seems like performance better. Do I need to uninstall resharper before using JustCode?

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• document.URL Matching in Javascript

  - by streetparade

  I have a url which looks like this https://test.high.com/people/11111111-name-firstname-_custa/deals/new Now i need to match document.URL if im on that Page if so i will alert a message. The important part is /deals/new How can i match that in Javascript?

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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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• C# How do I split a string by strings and include the delimiters?

  - by mafutrct

  There are many similar questions, but apparently no perfect match, that's why I'm asking. I'd like to split a random string (e.g. 123xx456yy789) by a list of string delimiters (e.g. xx, yy) and include the delimiters in the result (here: 123, xx, 456, yy, 789). Good performance is a nice bonus. Regex should be avoided, if possible.

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• Do compiled PHP scripts exist?

  - by dabito

  Hi, I am wondering if anyone has used or read about PHP scripts compiled as a .so extension for Apache... Thing is I think I remember reading about it somewhere but dont know if such a thing exists. This looks promising, but incomplete and abandoned: http://phpcompiler.org/ Im interested because i think it could improve performance... Perhaps someone could point out a framework or apache extension that does this. Thanks!!

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• What was the most stupid code mistake you have ever made?

  - by Ramesh

  What was the most stupid code mistake you have ever made that had great consequences, e.g. you were fired? For example, a friend of mine wrote a cycle with conditional statement for break that was never true, which caused one high-loaded site to hang up for the whole night.

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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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• StringBuilder and StringBuffer in Java

  - by blacktiger

  What is the main difference between StringBuffer and StringBuilder? Is there any performance issues when deciding on any one of these?

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• Read Windows event logs using Enterprise Library

  - by Sathish

  I am using Enterprise library 3.1 to log application logs in Windows event logs, and I want to read this log by passing the date parameter. Please note that I will be accessing the remote machine and the performance should be good. Is there any method that can be used to read these logs using Ent Lib, or please suggest some good method.

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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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• Better mode for do a select with group by

  - by Luca Romagnoli

  Hi i've wrote a query that works: SELECT `comments`.* FROM `comments` RIGHT JOIN (SELECT MAX( id ) AS id, core_id, topic_id FROM comments GROUP BY core_id, topic_id order by id desc) comm ON comm.id = comments.id LIMIT 10 I want know if is possible and how rewrite it for get better performance. thanks

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• How should I access to SQL Server DB?

  - by worlds-apart89

  I have been reading that direct access to a SQL Server database over the Internet is insecure, so I am wondering what intermediary I can and should use between the client and the server. What are the best practices in terms of security and performance?

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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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• Multiple if blocks or a single if with AND condition

  - by Ram

  If I need to check multiple conditions, which is the preferred way with respect to performance if( CND1 && CND2 && CND3 && CND4) { } else { } or if(CND1) { if(CND2) { if(CND3) { if(CND4) { } else { } } else { } } else { } } }

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• CSS - Advantages of single image file vs multiple files

  - by Hamish

  I have noticed that alot of sites now, have all of their images in single files are then use background-position to offset the rectangle which is shown on the screen. Is this for performance reasons? If so why?

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