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• Dual boot, win7 & ubuntu. Gparted, resize not move. Performance?

  - by data_jepp

  I installed dual boot on a computer that already had win7 installed. The question here is about gparted ability to move partitions. I made place for ubuntu in the computers "Data" partition, by resizing it. But I canceled the "move" action. Was that incredibly stupid, or is this care? Maybe performance is affected. Can this effect the hd's lifespan? The computer is UL30A.

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• How close can I get C# to the performance of C++ for small intensive tasks?

  - by SLC

  I was thinking about the speed difference of C++ to C# being mostly about C# compiling to byte-code that is taken in by the JIT compiler (is that correct?) and all the checks C# does. I notice that it is possible to turn a lot of these functions off, both in the compile options, and possibly through using the unsafe keyword as unsafe code is not verifiable by the common language runtime. Therefore if you were to write a simple console application in both languages, that flipped an imaginary coin an infinite number of times and displayed the results to the screen every 10,000 or so iterations, how much speed difference would there be? I chose this because it's a very simple program. I'd like to test this but I don't know C++ or have the tools to compile it. This is my C# version though: static void Main(string[] args) { unsafe { Random rnd = new Random(); int heads = 0, tails = 0; while (true) { if (rnd.NextDouble() > 0.5) heads++; else tails++; if ((heads + tails) % 1000000 == 0) Console.WriteLine("Heads: {0} Tails: {1}", heads, tails); } } } Is the difference enough to warrant deliberately compiling sections of code "unsafe" or into DLLs that do not have some of the compile options like overflow checking enabled? Or does it go the other way, where it would be beneficial to compile sections in C++? I'm sure interop speed comes into play too then. To avoid subjectivity, I reiterate the specific parts of this question as: Does C# have a performance boost from using unsafe code? Do the compile options such as disabling overflow checking boost performance, and do they affect unsafe code? Would the program above be faster in C++ or negligably different? Is it worth compiling long intensive number-crunching tasks in a language such as C++ or using /unsafe for a bonus? Less subjectively, could I complete an intensive operation faster by doing this?

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• How to increase the performance of a loop which runs for every 'n' minutes.

  - by GustlyWind

  Hi Giving small background to my requirement and what i had accomplished so far: There are 18 Scheduler tasks run at regular intervals (least being 30 mins) takes input of nearly 5000 eligible employees run into a static method for iteration and generates a mail content for that employee and mails. An average task takes about 9 min multiplied by 18 will be roughly 162 mins meanwhile there would be next tasks which will be in queue (I assume). So my plan is something like the below loop try { // Handle Arraylist of alerts eligible employees Iterator employee = empIDs.iterator(); while (employee.hasNext()) { ScheduledImplementation.getInstance().sendAlertInfoToEmpForGivenAlertType((Long)employee.next(), configType,schedType); } } catch (Exception vEx) { _log.error("Exception Caught During sending " + configType + " messages:" + configType, vEx); } Since I know how many employees would come to my method I will divide the while loop into two and perform simultaneous operations on two or three employees at a time. Is this possible. Or is there any other ways I can improve the performance. Some of the things I had implemented so far 1.Wherever possible made methods static and variables too Didn't bother to catch exceptions and send back because these are background tasks. (And I assume this improves performance) Get the DB values in one query instead of multiple hits. If am successful in optimizing the while loop I think i can save couple of mins. Thanks

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• Is having a lot of DOM elements bad for performance?

  - by rFactor

  Hi, I am making a button that looks like this: <!-- Container --> <div> <!-- Top --> <div> <div></div> <div></div> <div></div> </div> <!-- Middle --> <div> <div></div> <div></div> <div></div> </div> <!-- Bottom --> <div> <div></div> <div></div> <div></div> </div> </div> It has many elements, because I want it to be skinnable without limiting the skinners abilities. However, I am concerned about performance. Does having a lot of DOM elements refrect bad performance? Obviously there will always be an impact, but how great is that?

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• Performance of a get unique elements/group by operation on an IEnumerable<T>.

  - by tolism7

  I was wondering how could I improve the performance of the following code: public class MyObject { public int Year { get; set; } } //In my case I have 30000 IEnumerable<MyObject> data = MethodThatReturnsManyMyObjects(); var groupedByYear = data.GroupBy(x => x.Year); //Here is the where it takes around 5 seconds foreach (var group in groupedByYear) //do something here. The idea is to get a set of objects with unique year values. In my scenario there are only 6 years included in the 30000 items in the list so the foreach loop will be executed 6 times only. So we have many items needing to be grouped in a few groups. Using the .Distinct() with an explicit IEqualityComparer would be an alternative but somehow I feel that it wont make any difference. I can understand if 30000 items is too much and that i should be happy with the 5 seconds I get, but I was wondering if the above can be imporved performance wise. Thanks.

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• Rewriting jQuery to plain old javascript - are the performance gains worth it?

  - by Swader

  Since jQuery is an incredibly easy and banal library, I've developed a rather complex project fairly quickly with it. The entire interface is jQuery based, and memory is cleaned regularly to maintain optimum performance. Everything works very well in Firefox, and exceptionally so in Chrome (other browsers are of no concern for me as this is not a commercial or publicly available product). What I'm wondering now is - since pure plain old javascript is really not a complicated language to master, would it be performance enhancing to rewrite the whole thing in plain old JS, and if so, how much of a boost would you expect to get from it? If the answers prove positive enough, I'll go ahead and do it, run a benchmark and report back with the precise findings. Cheers Edit: Thanks guys, valuable insight. The purpose was not to "re-invent the wheel" - it was just for experience and personal improvement. Just because something exists, doesn't mean you shouldn't explore it into greater detail, know how it works or try to recreate it. This is the same reason I seldom use frameworks, I would much rather use my own code and iron it out and gain massive experience doing it, than start off by using someone else's code, regardless of how ironed out it is. Anyway, won't be doing it, thanks for saving me the effort :)

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• MySQL - What is wrong with this query or my database? Terrible performance.

  - by Moss

  SELECT * from `employees` a LEFT JOIN (SELECT phone1 p1, count(*) c, FROM `employees` GROUP BY phone1) b ON a.phone1 = b.p1; I'm not sure if it is this query in particular that has the problem. I have been getting terrible performance in general with this database. The table in question has 120,000 rows. I have tried this particular query remotely and locally with the MyISAM and InnoDB engines, with different types of joins, and with and without an index on phone1. I can get this to complete in about 4 minutes on a 10,000 row table successfully but performance drops exponentially with larger tables. Remotely it will lose connection to the server and locally it brings my system to its knees and seems to go on forever. This query is only a smaller step I was trying to do when a larger query couldn't complete. Maybe I should explain the whole scenario. I have one big flat ugly table that lists a bunch of people and their contact info and the info of the companies they work for. I'm trying to normalize the database and intelligently determine which phone numbers apply to individual people and which apply to an office location. My reasoning is that if a phone number occurs multiple times and the number of occurrence equals the number of times that the street address it is attached to occurs then it must be an office number. So the first step is to count each phone number grouping by phone number. Normally if you just use COUNT()...GROUP BY it will only list the first record it finds in that group so I figured I have to join the full table to the count table where the phone number matches. This does work but as I said I can't successfully complete it on any table much larger than 10,000 rows. This seems pathetic and this doesn't seem like a crazy query to do. Is there a better way to achieve what I want or do I have to break my large table into 12 pieces or is there something wrong with the table or db?

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• Creating site with wix.com or weebly.com [on hold]

  - by Edgar

  I decided to create web page and for that purpose I find out that I can use wix.com portal. My knowledge of HTML,CSS is on basic level. So I want to ask what are pros and cons of creating webPages using WIX to compare with making your on your own (writing code by yourself). One of the questions is: can I put custom advertisements to the my page. Also would appreciate of suggestions what portal is better for wix.com or weebly.com or for good website I should choose codding by myself? Finally, would be nice to get any suggestions in this field.

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• On which crowdsourced design site have you the best experience? (ie, crowdspring, mycroburst, etc)

  - by Darryl Hein

  I wasn't sure which site to ask this on (as Graphic Design hasn't reached beta yet), so I thought I would try here. I'm looking to have a couple logos and website designs done. I've had some great local designers, but each one has moved or gone else where so I keep having to look for new designers. My thought and realization in the last couple days is to go to a crowdsourced design site like crowdspring.com or mycroburst.com. Both of these sites look good, but I'm wondering what else is out there? Are there better ones and how have your experiences been them?

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• Fetching templates via API. Who provides this service?

  - by Guandalino

  I'm mainly a server side developer. I'm not a designer, even if I understand web layouts, grids, CSS, typography, valid markup, etc. and I'm able to do some graphic work too (almost). It just takes a lot of time and the result is not always beautiful. I know there are tons of website templates sites out there, and I'd like to use their designs as a starting point for my customers' works, giving them the possibility to choose the design they like more. I'd just prefer to show the templates catalog to customers from within my site, fetching templates info (screenshots, description, etc) from a remote server using an API. TemplateMonster.com provides, or provided, such API. But the service responds with "Unauthorized usage". Are there other sites offering this kind of retrieval service?

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• Webhosting for a TV channel with streaming video

  - by Murtez

  Hi guys, I'm making a website for a web based TV channel, so I'm assuming it will be heavy on bandwidth usage, but I'm no good at calculating bandwidth. Couple of questions: Assuming the site streams HD video 24 / 7 to 1000 people, how much bandwidth is that? Where should something like this be hosted? The channel will have a fiber internet optic connection, but I don't know the limit on their bandwidth, would it be better to get their own server or host online? In either case in question 2, any recommendations? I'm usually a regular web designer for minor businesses, so this is a new level. Your help is appreciated.

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• Making fonts render similarly across browsers

  - by Zach L.

  I am building a website for a client, and we had hoped to use plain text, not images in the navigation bar. The font we are using is Century Gothic (I believe that this font is available on the majority of PCs and Macs) The problem is, that on different browsers the font renders significantly differnt. In Chrome we got it looking the way we want, but in firefox the text is smaller and bolder. Aside from writing browser specific javascript to alter the font properties, are there any other options to standardize the way the fonts are rendered cross-browser. Perhaps some library or API? Maybe its a matter of being more specific in declaring font properties? Honestly I am stuck and need help.

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• HD video editing system with Truecrypt

  - by Rob

  I'm looking to do hi-def video editing and transcoding on an unencrypted standard partition, with Truecrypt on the system partition for sensitive data. I'm aiming to keep certain data private but still have performance where needed. Goals: Maximum, unimpacted, performance possible for hi-def video editing, encryption of video not required Encrypt system partition, using Truecrypt, for web/email privacy, etc. in the event of loss In other words I want to selectively encrypt the hard drive - i.e. make the system partition encrypted but not impact the original maximum performance that would be available to me for hi-def/HD video editing. The thinking is to use an unencrypted partition for the video and set up video applications to point at that. Assuming that they would use that partition only for their workspace and not the encrypted system partition, then I should expect to not get any performance hit. Would I be correct? I guess it might depend on the application, if that app is hard-wired to use the system partition always for temporary storage during editing and transcoding, or if it has to be installed on the C: system partition always. So some real data on how various apps behave in the respect would be useful, e.g. Adobe, Cyberlink, Nero etc. etc. I have a Intel i7 Quad-core (8 threads) 1.6Ghz (up to 2.8Ghz turbo-boost) 4Gb, 7200rpm SATA, nvidia HP laptop. I've read the excellent posting about the general performance impact of truecrypt but the benchmarks weren't specific enough for my needs where I'm dealing with HD-video and using a non-encrypted partition to maintain max performance.

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• Is it needed to have your blog title and description in H1 and H2

  - by Saif Bechan

  I have read an article that states that it is not necessary to have your blog title and description on your website at all. Just have the titles of the posts in h1, on the index and the post page. And on the post page have your different sections started with h2. Widget headers start with h3. Title and description are most of the time in the logo image. I have looked at the source of my favorite blog, http://net.tutsplus.com, and I see they do the same. Is this recommended?

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• Cheaper alternatives to 99Designs.com (outsource CSS design)

  - by Chris Smith

  I'm designing my own website as a side project and I want the site to look professional. (Read, not designed by a programmer.) I don't mind spending a little money to have a professional do it, but design sites like 99designs.com cost way to much. (~$500+) Is there a cheaper (~$100 - $200) alternative for getting a designer to improve an existing site? (Things like updating the CCS or suggesting better ways for laying out the navigation.) Or is my best bet trying to pick up a freelancer on Craigslist?

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• Cheaper alternatives to 99Designs.com (outsource CSS design)

  - by Chris Smith

  I'm designing my own website as a side project and I want the site to look professional. (Read, not designed by a programmer.) I don't mind spending a little money to have a professional do it, but design sites like 99designs.com cost way to much. (~$500+) Is there a cheaper (~$100 - $200) alternative for getting a designer to improve an existing site? (Things like updating the CCS or suggesting better ways for laying out the navigation.) Or is my best bet trying to pick up a freelancer on Craigslist?

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• Best free wireframe software for websites

  - by Fritz Meissner

  Working on a non-profit project and wondering if there's a standout wireframing tool for website design. I've taken photos of collaborative whiteboard drawings and now I want to put the results into something slightly more professional looking for review. For obvious reasons I'm not interested in anything that looks too much like the finished product or takes longer than it would for me to write the HTML. I checked out jumpchart, but that only seems to let you do content panes, not draw whole page layouts. Free or close to free is desirable - for instance jumpchart licensing seems very reasonable.

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• Are the famous websites handmade? [closed]

  - by Mithun Chuckraverthy

  I'm a newbie in web designing. I always wanted to build a professional quality website by myself. So, I started learning HTML/XHTML and CSS for presentation; and, JavaScript and PHP/MySQL for scripting. I wonder, would the developers of famous websites design them by hand? Or, have they found out any better idea of using softwares? If so, can you tell me what are they? (By the word famous, I mean any websites that are liked by millions of people all over the world. Like: Google, Facebook etc.) Thanks in advance!

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• Is it illegal to use content in such a way?

  - by MHZ

  I have a couple of questions about the legality of the content of some websites. I am currently working on two websites and I would like to make sure I am not breaking any laws, by using some content like I am... Do I need to get a license to use images from the Internet (such as google.images.com) in my site, assuming they aren't a company logo belonging to another company? If not, am I allowed to use it after I modify it with a image editing software? If content such as phone numbers, e-mail addresses, website addresses, and text from websites can be found for free online, and I gather this information for a search engine based site that I am working on and offering this information on a paid basis (similar to google, but more specialized), is something that is legal? Note: I am not 'copying' or redirecting business from anywhere, to my site. The exact opposite, the site I am working on actually helps advertise businesses and make it easier for customers to find them.

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• Responsive Menu Navigation [closed]

  - by Aaron Brewer

  I am sure you all have heard of Responsive/Adaptive Website Design and Development, but for the sake of beginners to the technique and skill, what are ways to create a Responsive Menu Navigation? I know there are a few standard ways, hence: JavaScript/jQuery Menu that changes functionality at different breakpoints. CSS3 Menu that changes functionality at different breakpoints. If you have had the opportunity to create a Responsive Menu, what technique did you use? How did you do it? Do you have an example? Did your Menu change functionality at different break points? To read up on Responsive and Adaptive Design: http://johnpolacek.github.com/scrolldeck.js/decks/responsive/ To read up on Responsive and Adaptive Design Menus: http://blog.usabilla.com/10-tips-how-to-handle-responsive-navigation-menus-successfully/ I hope this will save Pro Webmasters plenty of duplicate questions.

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• Using MLP, how to make a link to the according page in the other languages?

  - by lyle

  Hi all, the question says it all, but here's a bit more detail: I help building a bilingual website using MLP on TextPattern. It's trivial to put a link to the top level page of another language, but how to put a link to the current page in another language? Eg. /en/contact should link to /de/kontakt (the same article in another language). I'm sure there are some variables somewhere that I could put into the template that would be filled with the correct links. Thankx in advance. :)

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• Best in-depth analytics or stats tools? (preferrably server-side)

  - by Litso

  Hey all, I know there's been questions about this before, but mine is a little more specific. I work for a high traffic website and we want to start tracking our visitors better. Unfortunately, Google Analytics is not an option at the moment, so what I'm looking for is some alternatives, preferrably server-side (but not necessarily). We're currently running Urchin, but what I'm missing most there is the way you can set conversions in Analytics and then track (for example) which keywords convert better or which landing pages convert better. Also, A/B testing is something I really miss. Which analytics tools can be compared to analytics in terms of advanced segmentation, navigation summaries, A/B testing, etc?

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• Why is my rsync so slow?

  - by iblue

  My Laptop and my workstation are both connected to a Gigabit Switch. Both are running Linux. But when I copy files with rsync, it performs badly. I get about 22 MB/s. Shouldn't I theoretically get about 125 MB/s? What is the limiting factor here? EDIT: I conducted some experiments. Write performance on the laptop The laptop has a xfs filesystem with full disk encryption. It uses aes-cbc-essiv:sha256 cipher mode with 256 bits key length. Disk write performance is 58.8 MB/s. iblue@nerdpol:~$ LANG=C dd if=/dev/zero of=test.img bs=1M count=1024 1073741824 Bytes (1.1 GB) copied, 18.2735 s, 58.8 MB/s Read performance on the workstation The files I copied are on a software RAID-5 over 5 HDDs. On top of the raid is a lvm. The volume itself is encrypted with the same cipher. The workstation has a FX-8150 cpu that has a native AES-NI instruction set which speeds up encryption. Disk read performance is 256 MB/s (cache was cold). iblue@raven:/mnt/bytemachine/imgs$ dd if=backup-1333796266.tar.bz2 of=/dev/null bs=1M 10213172008 bytes (10 GB) copied, 39.8882 s, 256 MB/s Network performance I ran iperf between the two clients. Network performance is 939 Mbit/s iblue@raven $ iperf -c 94.135.XXX ------------------------------------------------------------ Client connecting to 94.135.XXX, TCP port 5001 TCP window size: 23.2 KByte (default) ------------------------------------------------------------ [ 3] local 94.135.XXX port 59385 connected with 94.135.YYY port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.09 GBytes 939 Mbits/sec

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• Google Analytics + External Site Statistics Tracking in one application?

  - by Soleil

  My company is a broker in the real estate industry. As such, we send a lot of our listings to sites like Trulia.com and Zillow.com, among others. These sites direct leads to our realtors, and provide us with reports every month detailing the activity our listings have had on their site-- links back to our website, emails generated, etc. Our Marketing and Advertising departments want to take that information and enter it into a system to keep track of everything in one place, for the purpose of producing comparison reports. I cannot find any externally available product that provides this functionality. I would sincerely like to avoid writing this tool myself. Does anyone know of a tool that could do this? In short, an ideal system would: Imports Google Analytics data via API Imports real estate listing site data via CSV import / manual entry Provides comparison reports based on data Does anyone know of anything pre-made that can do this?

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• OAM OVD integration - Error Encounterd while performance test "LDAP response read timed out, timeout used:2000ms"

  - by siddhartha_sinha

  While working on OAM OVD integration for one of my client, I have been involved in the performance test of the products wherein I encountered OAM authentication failures while talking to OVD during heavy load. OAM logs revealed the following: oracle.security.am.common.policy.common.response.ResponseException: oracle.security.am.engines.common.identity.provider.exceptions.IdentityProviderException: OAMSSA-20012: Exception in getting user attributes for user : dummy_user1, idstore MyIdentityStore with exception javax.naming.NamingException: LDAP response read timed out, timeout used:2000ms.; remaining name 'ou=people,dc=oracle,dc=com' at oracle.security.am.common.policy.common.response.IdentityValueProvider.getUserAttribute(IdentityValueProvider.java:271) ... During the authentication and authorization process, OAM complains that the LDAP repository is taking too long to return user attributes.The default value is 2 seconds as can be seen from the exception, "2000ms". While troubleshooting the issue, it was found that we can increase the ldap read timeout in oam-config.xml.  For reference, the attribute to add in the oam-config.xml file is: <Setting Name="LdapReadTimeout" Type="xsd:string">2000</Setting> However it is not recommended to increase the time out unless it is absolutely necessary and ensure that back-end directory servers are working fine. Rather I took the path of tuning OVD in the following manner: 1) Navigate to ORACLE_INSTANCE/config/OPMN/opmn folder and edit opmn.xml. Search for <data id="java-options" ………> and edit the contents of the file with the highlighted items: <category id="start-options"><data id="java-bin" value="$ORACLE_HOME/jdk/bin/java"/><data id="java-options" value="-server -Xms1024m -Xmx1024m -Dvde.soTimeoutBackend=0 -Didm.oracle.home=$ORACLE_HOME -Dcommon.components.home=$ORACLE_HOME/../oracle_common -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:/opt/bea/Middleware/asinst_1/diagnostics/logs/OVD/ovd1/ovdGClog.log -XX:+UseConcMarkSweepGC -Doracle.security.jps.config=$ORACLE_INSTANCE/config/JPS/jps-config-jse.xml"/><data id="java-classpath" value="$ORACLE_HOME/ovd/jlib/vde.jar$:$ORACLE_HOME/jdbc/lib/ojdbc6.jar"/></category></module-data><stop timeout="120"/><ping interval="60"/></process-type> When the system is busy, a ping from the Oracle Process Manager and Notification Server (OPMN) to Oracle Virtual Directory may fail. As a result, OPMN will restart Oracle Virtual Directory after 20 seconds (the default ping interval). To avoid this, consider increasing the ping interval to 60 seconds or more. 2) Navigate to ORACLE_INSTANCE/config/OVD/ovd1 folder.Open listeners.os_xml file and perform the following changes: · Search for <ldap id=”Ldap Endpoint”…….> and point the cursor to that line. · Change threads count to 200. · Change anonymous bind to Deny. · Change workQueueCapacity to 8096. Add a new parameter <useNIO> and set its value to false viz: <useNIO>false</useNio> Snippet: <ldap version="8" id="LDAP Endpoint"> ....... .......  <socketOptions><backlog>128</backlog>         <reuseAddress>false</reuseAddress>         <keepAlive>false</keepAlive>         <tcpNoDelay>true</tcpNoDelay>         <readTimeout>0</readTimeout>      </socketOptions> <useNIO>false</useNIO></ldap> Restart OVD server. For more information on OVD tuneup refer to http://docs.oracle.com/cd/E25054_01/core.1111/e10108/ovd.htm. Please Note: There were few patches released from OAM side for performance tune-up as well. Will provide the updates shortly !!!

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