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  • Improve Performance of char.IsWhiteSpace for ASCII inputs in .NET 3.5

    - by Tanzim Saqib
    IsNullOrWhiteSpace is a new method introduced in string class in .NET 4.0. While this is a very useful method in string based processing, I attempted to implement it in .NET 3.5 using char.IsWhiteSpace() . I have found significant performance penalty using this method which I replaced later on, with my version. The following code takes about 20.6074219 seconds in my machine whereas my implementation of char.IsWhiteSpace takes about 1/4 less time 15.8271485 seconds only. In many scenarios ex. string...(read more)

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  • The meaning of thermal throttle counters and package power limit notifications in Linux

    - by Trustin Lee
    Whenever I do some performance testing on my Linux-installed MacBook Pro, I often see the following messages in dmesg: Aug 8 09:29:31 infinity kernel: [79791.789404] CPU1: Package power limit notification (total events = 40365) Aug 8 09:29:31 infinity kernel: [79791.789408] CPU3: Package power limit notification (total events = 40367) Aug 8 09:29:31 infinity kernel: [79791.789411] CPU2: Package power limit notification (total events = 40453) Aug 8 09:29:31 infinity kernel: [79791.789414] CPU0: Package power limit notification (total events = 40453) I also see the throttle counters in the sysfs increases over time: trustin@infinity:/sys/devices/system/cpu/cpu0/thermal_throttle $ ls core_power_limit_count package_power_limit_count core_throttle_count package_throttle_count $ cat core_power_limit_count 0 $ cat core_throttle_count 41912 $ cat package_power_limit_count 67945 $ cat package_throttle_count 67565 What do these counters mean? Do they affect the performance of CPU or system? Do they result in increased deviation of performance numbers? (i.e. Do they prevent me from getting reliable performance numbers?) If so, how do I avoid these messages and increasing counters? Would running the performance tests on a well-cooled desktop system help?

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  • Web Site Performance and Assembly Versioning

    - by capgpilk
    I originally wanted to write this post in one, but there is quite a large amount of information which can be broken down into different areas, so I am going to publish it in three posts. Minification and Concatination of JavaScript and CSS Files – this post Versioning Combined Files Using Subversion – published shortly Versioning Combined Files Using Mercurial – published shortly Website Performance There are many ways to improve web site performance, two areas are reducing the amount of data that is served up from the web server and reducing the number of files that are requested. Here I will outline the process of minimizing and concatenating your javascript and css files automatically at build time of your visual studio web site/ application. To edit the project file in Visual Studio, you need to first unload it by right clicking the project in Solution Explorer. I prefer to do this in a third party tool such as Notepad++ and save it there forcing VS to reload it each time I make a change as the whole process in Visual Studio can be a bit tedious. Now you have the project file, you will notice that it is an MSBuild project file. I am going to use a fantastic utility from Microsoft called Ajax Minifier. This tool minifies both javascript and css. 1. Import the tasks for AjaxMin choosing the location you installed to. I keep all third party utilities in a Tools directory within my solution structure and source control. This way I know I can get the entire solution from source control without worrying about what other tools I need to get the project to build locally. 1: <Import Project="..\Tools\MicrosoftAjaxMinifier\AjaxMin.tasks" /> 2. Now create ItemGroups for all your js and css files like this. Separating out your non minified files and minified files. This can go in the AfterBuild container. 1: <Target Name="AfterBuild"> 2:  3: <!-- Javascript files that need minimizing --> 4: <ItemGroup> 5: <JSMin Include="Scripts\jqModal.js" /> 6: <JSMin Include="Scripts\jquery.jcarousel.js" /> 7: <JSMin Include="Scripts\shadowbox.js" /> 8: </ItemGroup> 9: <!-- CSS files that need minimizing --> 10: <ItemGroup> 11: <CSSMin Include="Content\Site.css" /> 12: <CSSMin Include="Content\themes\base\jquery-ui.css" /> 13: <CSSMin Include="Content\shadowbox.css" /> 14: </ItemGroup>   1: <!-- Javascript files to combine --> 2: <ItemGroup> 3: <JSCat Include="Scripts\jqModal.min.js" /> 4: <JSCat Include="Scripts\jquery.jcarousel.min.js" /> 5: <JSCat Include="Scripts\shadowbox.min.js" /> 6: </ItemGroup> 7: <!-- CSS files to combine --> 8: <ItemGroup> 9: <CSSCat Include="Content\Site.min.css" /> 10: <CSSCat Include="Content\themes\base\jquery-ui.min.css" /> 11: <CSSCat Include="Content\shadowbox.min.css" /> 12: </ItemGroup>   3. Call AjaxMin to do the crunching. 1: <Message Text="Minimizing JS and CSS Files..." Importance="High" /> 2: <AjaxMin JsSourceFiles="@(JSMin)" JsSourceExtensionPattern="\.js$" 3: JsTargetExtension=".min.js" JsEvalTreatment="MakeImmediateSafe" 4: CssSourceFiles="@(CSSMin)" CssSourceExtensionPattern="\.css$" 5: CssTargetExtension=".min.css" /> This will create the *.min.css and *.min.js files in the same directory the original files were. 4. Now concatenate the minified files into one for javascript and another for css. Here we write out the files with a default file name. In later posts I will cover versioning these files the same as your project assembly again to help performance. 1: <Message Text="Concat JS Files..." Importance="High" /> 2: <ReadLinesFromFile File="%(JSCat.Identity)"> 3: <Output TaskParameter="Lines" ItemName="JSLinesSite" /> 4: </ReadLinesFromFile> 5: <WriteLinestoFile File="Scripts\site-script.combined.min.js" Lines="@(JSLinesSite)" 6: Overwrite="true" /> 7: <Message Text="Concat CSS Files..." Importance="High" /> 8: <ReadLinesFromFile File="%(CSSCat.Identity)"> 9: <Output TaskParameter="Lines" ItemName="CSSLinesSite" /> 10: </ReadLinesFromFile> 11: <WriteLinestoFile File="Content\site-style.combined.min.css" Lines="@(CSSLinesSite)" 12: Overwrite="true" /> 5. Save the project file, if you have Visual Studio open it will ask you to reload the project. You can now run a build and these minified and combined files will be created automatically. 6. Finally reference these minified combined files in your web page. In the next two posts I will cover versioning these files to match your assembly.

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  • Supercharging the Performance of Your Front-Office Applications @ OOW'12

    - by Sanjeev Sharma
    You can increase customer satisfaction, brand equity, and ultimately top-line revenue by deploying  Oracle ATG Web Commerce, Oracle WebCenter Sites, Oracle Endeca applications, Oracle’s  Siebel applications, and other front-office applications on Oracle Exalogic, Oracle’s combination  of hardware and software for applications and middleware. Join me (Sanjeev Sharma) and my colleague, Kelly Goetsch, at the following conference session at Oracle Open World to find out how Customer Experience can be transformed with Oracle Exalogic: Session:  CON9421 - Supercharging the Performance of Your Front-Office Applications with Oracle ExalogicDate: Wednesday, 3 Oct, 2012Time: 10:15 am - 11:15 am (PST)Venue: Moscone South (309)

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  • Downloading large files hangs system

    - by Igor
    When Im trying to download large files, i.e. 1gb or more under FireFox, first of all it starts with very big download speed and in few seconds in almost get up to max (~11 MBps). It is downloading very fast, but when downloaded size becomes near 700-800mb and more, my system almost completely hangs, so I can do nothing - I just have to wait until it finishes downloading. Also when it hangs, I can't see the download progress - it looks like it completely hangs. Sometimes, however, if the file size is near 1gb, the system comes back from hang, finishing download, but sometimes I just cant wait before system comes back and have to kill FF from top (it takes me 2 minutes to do this, because of very slow system performance). I use Firefox as primary browser. If I use wget with direct link to file - everything is fine. Speed at max, no performance decrease. So what can I do?

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  • Windows Azure Recipe: High Performance Computing

    - by Clint Edmonson
    One of the most attractive ways to use a cloud platform is for parallel processing. Commonly known as high-performance computing (HPC), this approach relies on executing code on many machines at the same time. On Windows Azure, this means running many role instances simultaneously, all working in parallel to solve some problem. Doing this requires some way to schedule applications, which means distributing their work across these instances. To allow this, Windows Azure provides the HPC Scheduler. This service can work with HPC applications built to use the industry-standard Message Passing Interface (MPI). Software that does finite element analysis, such as car crash simulations, is one example of this type of application, and there are many others. The HPC Scheduler can also be used with so-called embarrassingly parallel applications, such as Monte Carlo simulations. Whatever problem is addressed, the value this component provides is the same: It handles the complex problem of scheduling parallel computing work across many Windows Azure worker role instances. Drivers Elastic compute and storage resources Cost avoidance Solution Here’s a sketch of a solution using our Windows Azure HPC SDK: Ingredients Web Role – this hosts a HPC scheduler web portal to allow web based job submission and management. It also exposes an HTTP web service API to allow other tools (including Visual Studio) to post jobs as well. Worker Role – typically multiple worker roles are enlisted, including at least one head node that schedules jobs to be run among the remaining compute nodes. Database – stores state information about the job queue and resource configuration for the solution. Blobs, Tables, Queues, Caching (optional) – many parallel algorithms persist intermediate and/or permanent data as a result of their processing. These fast, highly reliable, parallelizable storage options are all available to all the jobs being processed. Training Here is a link to online Windows Azure training labs where you can learn more about the individual ingredients described above. (Note: The entire Windows Azure Training Kit can also be downloaded for offline use.) Windows Azure HPC Scheduler (3 labs)  The Windows Azure HPC Scheduler includes modules and features that enable you to launch and manage high-performance computing (HPC) applications and other parallel workloads within a Windows Azure service. The scheduler supports parallel computational tasks such as parametric sweeps, Message Passing Interface (MPI) processes, and service-oriented architecture (SOA) requests across your computing resources in Windows Azure. With the Windows Azure HPC Scheduler SDK, developers can create Windows Azure deployments that support scalable, compute-intensive, parallel applications. See my Windows Azure Resource Guide for more guidance on how to get started, including links web portals, training kits, samples, and blogs related to Windows Azure.

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  • Visual Studio 2010: Custom Start Page

    - by Steve Clements
    As Visual Studio 2010 IDE has been mostly written in WPF, extending the start page has become pretty darn easy and I for one find this quite interesting as I always open with the start page and the more customisation I can have the better! There are a few things you will need to install first to get going Visual Studio 2010 SDK Start page project template, which you can either get from the New Project dialog, in the online gallery section in VS or download from here   I was going to write a blog post on how to create a custom start page, but decided that msdn have done such a good job I was pretty much wasting my time, so take a look here, it has in detail everything you need to know to get it done! :) Technorati Tags: Visual Studio 2010,Custom Start Pages

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  • Will unity stop being a plugin for Compiz?

    - by Murphy1138
    I ask this as with the Unity Desktop running , when I try any games with my Ubuntu 12.04.1 I get so much frame rate drop with Unity and Compiz. If I switch to Gnome-Classic which uses mutter, I get a vast boost in performance. My system is an 8 core AMD with a Nvidia 460 SE that can play anything I chuck at it in Windows and I'm using the latest Nvidia drivers, but even simple games like the humble bundle gets serious lag with Unity and the only cause of this can be compiz (what I can guess). When Steam come to Ubuntu, how will this performance loss be addressed?

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  • Groups page is blank in SharePoint 2010 [migrated]

    - by Murali Ramakrishnan
    Sometimes it's very confusing how Sharepoint 2010 group creation works Here's a scenario we have been facing from a long time wrt groups in SharePoint 2010 We had requirement of creating a two custom groups followed by creating a custom site through programmatically, For the most case the scenario works as how it is excepted to work. but, out of 1/100 site creation process the groups creation fails, which means we were able to access the group and users associated with it through programmatically. but, when it comes to UI stand point if you try to access the specific group page from the site permissions page - SharePoint returns a BLANK WHITE Page... BLANK WHITE Page... nothing else... Ain't is this a Sharepoint 2010 issue. or anybody had this problem and fixed it. Kindly share your thoughts

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  • Off-Page SEO Tactics - General

    Off-page or off the page means just that - things that we can do to help our website rank more highly in the search engines that are not carried out on the site itself. There is really only one way we can use off-page techniques to rank our site higher and that is to encourage backlinks. How do we do that though?

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  • ADF Desktop Integration Page Now Live on OTN

    - by juan.ruiz
    I’m happy to announce that we have launched the  ADF Desktop Integration home page on OTN. This page will centralize all the resources related to desktop integration. As you can notice, currently we are providing a variety of resources to help you understand the technology as well as to improve your overall ADF desktop integration learning experience. Let us know what you think about the page and what additional resources related to ADF desktop integration you would like us to include.

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  • High Performance Storage Systems for SQL Server

    Rod Colledge turns his pessimistic mindset to storage systems, and describes the best way to configure the storage systems of SQL Servers for both performance and reliability. Even Rod gets a glint in his eye when he then goes on to describe the dazzling speed of solid-state storage, though he is quick to identify the risks....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Transfer page from internal to external

    - by Theo Gulland
    Afternoon all! Currently I have a website with a list of audio products (essentially a search engine for audio deals). http://www.soundplaza.co.uk Once you go to the details page, you can then press the 'view deal' button to go to providers site e.g. = http://www.soundplaza.co.uk/all-deals/113/bookshelf-speakers/acoustic-energy-1 This jump between two sites is a bit harsh and I would like to show a transition page, to simply ease them into another site and not scare them off. Within this tradition page I will have a simple loading gif and some graphics showing that your transferring. QUESTION: What is the best way to send the details (link, product name etc) to this transfer page, to then wait 5 seconds, to then move on to the desired link... this can in NO WAY damage my SEO, if anything rel="nofollow" would be great if possible. Currently I have seen that you can submit form to the transition page, then you can use php sleep and then php header to transfer... however I am not sure if php header will transfer SEO value tot he provider? Any opinions would be great! Thanks

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  • Create speed baseline for local web file

    - by Michael Jasper
    Is there any tool or method that will load a localhost page a number of times, and return the averaged data for load times, onload events, Dom ready events, etc? I'd like to work on page speed optimization, but need a baseline before I begin. I have used both Google analytics and Webmaster tools, but I'd like an automated solutions that runs locally. My ideal solution would be a program or script that would take the path/file, number of iterations, and then take several minutes to load the page n times without cache and crunch numbers to create a baseline.

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  • Research about best way to present multiple products on one page

    - by Michael Dibbets
    I am updating a webshop page. This is a fairly simple page that displays all the products that we currently sell. The page in development is visible here ( https://www.ortho.nl/wwebshop ). Now I was curious, and since I can't find anything via google etc..(probaly don't know the right keywords) what the best way is to present multiple products on one page. Should you use borders? Should you use colours? Which colours? what kind of tweaks will direct the customers attention to the right place? Does anyone know from experience or via research(and could you point me in the right direction to find that research) what the best way to present products is so conversion/clickthrough is optimised?

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  • How to remove the graphical user interface?

    - by Praveen Kumar
    Ok my question is that, I want to run a heavy application, on a Virtual Machine (VirtualBox) with just 2 GB RAM (Windows 7 32Bit Host has 4 GB, 3.5 GB effective). Initially I thought of installing Ubuntu Server 12.04.1, which doesn't come with a GUI, so I thought it would be efficient in performance, but I have only Ubuntu 12.04 Desktop. My question is, is it possible to remove the GUI parts in Ubuntu 12.04 Desktop (Not Server), keeping only the core OS, after installation in a virtual machine? Or, is there anyway to improve the performance of the OS? If you need more information, I am ready to provide. I don't want the GUI or anything, even a small terminal window is fine for me, I can access files through FTP.

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  • What are the benefits of archiving?

    - by HappyDeveloper
    I always see sites that only keeps fresh content on the home or subsections, and the rest of the content is kept in a separate section called 'archive'. Recently I have also heard that NoSQL DB's like MongoDB are good for archiving (which makes me think this is related to performance) So why do sites archive their content? What's the benefit over say, a simple paginator through which you could reach all the content? Is archiving done for performance? Or SEO? Or just user experience?

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  • SQL SERVER Improve Performance by Reducing IO Creating Covered Index

    This blog post is in the response of the T-SQL Tuesday #004: IO by Mike Walsh. The subject of this month is IO. Here is my quick blog post on how Cover Index can Improve Performance by Reducing IO.Let us kick off this post with disclaimers about Index. Index is a very complex subject and [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Remove Clutter from the Opera Speed Dial Page

    - by Asian Angel
    Do you want to clean up the Speed Dial page in Opera so that only the thumbnails are visible? Today we show you a couple of tweaks that will make it happen. Speed Dial Page The search bar and text at the bottom take up room and add clutter to the look and feel of Opera’s Speed Dial page. Changing the Settings Two small tweaks to the config settings will clean it all up. To get started type opera:config into the address bar and press enter. Type “speed” into the quick find bar and look for the Speed Dial State entry. Change the 1 to 2 and click save. You will see the following message concerning the changes…click OK. Next type “search” into the quick find bar and look for the Speed Dial Search Type entry. Remove all of the text in the blank and click save. Once again you will see a message about the latest change that you have made. At this point you may need to restart Opera for both changes to take full effect. There will be a noticeable difference in how the Speed Dial page looks afterwards and is much cleaner without the Search bar and text field. You will also still be able to access the right click context menu just like before. Conclusion If you have been looking to get a cleaner and less cluttered Speed Dial page in Opera, then these two little hacks will get the job done! Similar Articles Productive Geek Tips Set the Speed Dial as the Opera Startup PageReplace Google Chrome’s New Tab Page with Speed DialSpeed up Windows Vista Start Menu Search By Limiting ResultsBlank New Tab Quick-Fix for Google ChromeMonitor and Control Memory Usage in Google Chrome TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips VMware Workstation 7 Acronis Online Backup DVDFab 6 Revo Uninstaller Pro Backup Outlook 2010 Daily Motivator (Firefox) FetchMp3 Can Download Videos & Convert Them to Mp3 Use Flixtime To Create Video Slideshows Creating a Password Reset Disk in Windows Bypass Waiting Time On Customer Service Calls With Lucyphone

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