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  • Future of IE9: Opacity + Performance

    - by chris_l
    I just tried the IE9 "Second Internet Explorer Platform Preview" - which supports CSS opacity now. That's nice, but I tried it with one of my website prototypes, and it's quite slow when scrolling etc. Admittedly, the prototype uses hundreds of images with opacity != 1, but everything is snappy with current versions of Firefox, Safari, Chrome and Opera. Does anybody know, if there are plans for IE9 to become faster in this area? Even rumours about this would be interesting in this case.

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  • SQL Server insert performance with and without primary key

    - by Eric
    Summary: I have a table populated via the following: insert into the_table (...) select ... from some_other_table Running the above query with no primary key on the_table is ~15x faster than running it with a primary key, and I don't understand why. The details: I think this is best explained through code examples. I have a table: create table the_table ( a int not null, b smallint not null, c tinyint not null ); If I add a primary key, this insert query is terribly slow: alter table the_table add constraint PK_the_table primary key(a, b); -- Inserting ~880,000 rows insert into the_table (a,b,c) select a,b,c from some_view; Without the primary key, the same insert query is about 15x faster. However, after populating the_table without a primary key, I can add the primary key constraint and that only takes a few seconds. This one really makes no sense to me. More info: The estimated execution plan shows 0% total query time spent on the clustered index insert SQL Server 2008 R2 Developer edition, 10.50.1600 Any ideas?

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  • Cross domain iframe content load detection

    - by fpb
    I have a rather interesting problem. I have a parent page that will create a modal jquery dialog with an iframe contained within the dialog. The iframe will be populated with content from a 3rd party domain. My issue is that I need to create some dialog level javascript that can detect if the content of the iframe loaded successfully and if it hasn't within a 5 second time frame, then to close the dialog and return the user to the parent page. I have researched numerous solutions and only two are of any true value. Get the remote site to include a javascript line of document.domain = 'our-domain.com'. Use a URL Fragment hack, but again I would need the request that the remote site able to modify the URL by appending '#some_value' to the end of the URL and my dialog window would have to poll the URL until it either sees it or times out. Are these honestly the only options I have to work with? Is there not a simpler way to just detect this? I have been researching if there's a way to poll for http response errors, but this still remains confined to the same restrictions. Any help would be immensely appreciated. Thanks

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  • C++ assignment - stylish or performance?

    - by joejax
    Having been writing Java code for many years, I was amazed when I see this C++ statement: int a,b; int c = (a=1, b=a+2, b*3); My question is: Is this a choice of coding style, or it has real benefit? (looking for a practicle use case) I think the compiler will see it the same as following: int a=1, b=a+2; int c = b*3; (What's the offical name for this? I assume it's a standard C/C++ syntax.)

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  • using thread to load xsl transformation gives error.

    - by infant programmer
    I had to use threading to avoid "XSL Compilation time-out error" Now the problem I am facing is: It gives error, saying the output-string(generated as a result of transformation) is null!! Here is my C# code : [click_me] And the errors I am getting is copied in this text file : [click_me] And the original code without threading .. [click_me]

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  • Partitioning Windows 8.1 in order to have data partition first and system partitions at HDD end

    - by LivingSilver94
    How can I have recovery partition at the HDD end? My aim is to have data partition installed on fastest sectors of my hard drive, as I don't really care if restoring operations are slow... During Windows installation, when I create a partition, I get immediately created EFI and recovery ones just before the actual data partition. EFI position is good, I want my PC boot fast, but I want to move partitions I don't care about speed. I've also considered GParted, but I think I'm not able to use it :P

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  • vb.net more performance for moving objects

    - by René
    I have the mission to make a small game for a school project. Pictures boxes, moved by a timer for walking enemies.If there are around 5 or 6 moving picture boxes at the form, my application get troubles and lags. After I kill some enemies (remove them from the Controls Collection of the Form/Panel) It come back smooth. I think the loop of the enemy movement is too complicated but I don't know how to make that simpler. Private Sub TimerEnemyMovement_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TimerEnemyMovement.Tick For Each Enemy As Control In PanelBackground.Controls If Enemy.Name.Substring(0, 5) = "Enemy" Then _enemy.MoveEnemy(Enemy, 2) End If Next End Sub I also thought about Multithreading but not sure this would solve the problem and there is also the problem that I can't access the Controls of my mainform. You see, I don't have much knowledge about vb.net Any ideas how to fix that lag?

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  • how to load driver?

    - by Jassi
    Hi, I want to develop one driver so i have create one service and one .sys file for driver to be display now i do not know how to attach that two file or how to register my driver to windows. so just tell me the step which i should follow. Thanks and hoping for positive response.

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  • Why fill() and copy() of Collections in java is implemented this way

    - by Priyank Doshi
    According to javadoc... Collections.fill() is written as below : public static <T> void fill(List<? super T> list, T obj) { int size = list.size(); if (size < FILL_THRESHOLD || list instanceof RandomAccess) { for (int i=0; i<size; i++) list.set(i, obj); } else { ListIterator<? super T> itr = list.listIterator(); for (int i=0; i<size; i++) { itr.next(); itr.set(obj); } } } Its easy to understand why they didn't use listIterator for if (size < FILL_THRESHOLD || list instanceof RandomAccess) condition as of RandomAccess. But whats the use of size < FILL_THRESHOLD in above? I mean is there any significant performance benefit over using iterator for size>=FILL_THRESHOLD and not for size < FILL_THRESHOLD ? I see the same approach for Collections.copy() also : public static <T> void copy(List<? super T> dest, List<? extends T> src) { int srcSize = src.size(); if (srcSize > dest.size()) throw new IndexOutOfBoundsException("Source does not fit in dest"); if (srcSize < COPY_THRESHOLD || (src instanceof RandomAccess && dest instanceof RandomAccess)) { for (int i=0; i<srcSize; i++) dest.set(i, src.get(i)); } else { ListIterator<? super T> di=dest.listIterator(); ListIterator<? extends T> si=src.listIterator(); for (int i=0; i<srcSize; i++) { di.next(); di.set(si.next()); } } } FYI: private static final int FILL_THRESHOLD = 25; private static final int COPY_THRESHOLD = 10;

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  • Defining action on window load

    - by zac
    I am trying to get a page to display specific properties depending on whether or not a specific cookie is set... I am trying this var x = readCookie('age'); window.onload=function(){ if (x='null') { document.getElementById('wtf').innerHTML = ""; }; if (x='over13') { document.getElementById('wtf').innerHTML = ""; }; if (x='not13') { document.getElementById('emailBox').innerHTML = "<style type=\"text/css\">.formError {display:none}</style><p>Good Bye</p><p>You must be 13 years of age to sign up.</p>"; }; } It always just defaults to whatever is in the first if statement... I am still learning my javaScript so I am sure this is sloppy.. can someone please help me get this working?

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  • how do i do very fast inserts to SQL Server 2008

    - by CharlesO
    I have a project that involves recording data from a device directly into a sql table. I do very little processing in code before writing to sql server (2008 express by the way) typically i use the sqlhelper class's ExecuteNoneQuery method and pass in a stored proc name and list of parameters that the SP expects. This is very convenient, but i need a much faster way of doing this. Thanks.

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  • C#: How to implement a smart cache

    - by Svish
    I have some places where implementing some sort of cache might be useful. For example in cases of doing resource lookups based on custom strings, finding names of properties using reflection, or to have only one PropertyChangedEventArgs per property name. A simple example of the last one: public static class Cache { private static Dictionary<string, PropertyChangedEventArgs> cache; static Cache() { cache = new Dictionary<string, PropertyChangedEventArgs>(); } public static PropertyChangedEventArgs GetPropertyChangedEventArgsa(string propertyName) { if (cache.ContainsKey(propertyName)) return cache[propertyName]; return cache[propertyName] = new PropertyChangedEventArgs(propertyName); } } But, will this work well? For example if we had a whole load of different propertyNames, that would mean we would end up with a huge cache sitting there never being garbage collected or anything. I'm imagining if what is cached are larger values and if the application is a long-running one, this might end up as kind of a problem... or what do you think? How should a good cache be implemented? Is this one good enough for most purposes? Any examples of some nice cache implementations that are not too hard to understand or way too complex to implement?

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  • Clone elements and load previously loaded scripts

    - by kuswantin
    Hi, I am using clone() to move certain elements into another place in the DOM, but had trouble due to the fact that the scripts previously rendered was not available anymore when called from the cloned elements. So I think I need to call them again, but one by one will be a PITA. Perhaps getScript will do, but I have no idea to call more than one. Any help would be very much appreciated. Thanks

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  • GDI+ Load a jpg and save as 24bit png problem

    - by wookey
    Problem Hello all! I have this code which takes my jpg image loops through altering pixels and finally saving it as a png type. The problem is that the resulting image has a bit depth of 32 bits. I need it to be 24 bit, can any one shiny some light on the correct method of setting it? Am I along the right tracks looking at setting the pixel format to PixelFormat24bppRGB? Code static inline void Brighten(Gdiplus::Bitmap* img) { int width = img->GetWidth()/8,height = img->GetHeight(), max = (width*height),r,g,b; Gdiplus::Color pixel; for(int a = 0,x = 0, y = -1; a < max; ++a) { x = a%width; if(x == 0) ++y; img->GetPixel(x,y,&pixel); r = pixel.GetR(); g = pixel.GetG(); b = pixel.GetB(); if (r > 245) r = 245; if (g > 245) g = 245; if (b > 245) b = 245; r = 10; g = 10; b = 10; pixel = Gdiplus::Color(r,g,b); img->SetPixel(x,y,pixel);; } } ULONG_PTR m_dwToken = 0; Gdiplus::GdiplusStartupInput input; Gdiplus::GdiplusStartupOutput output; Gdiplus::GdiplusStartup( &m_dwToken, &input, &output ); USES_CONVERSION_EX; Gdiplus::ImageCodecInfo* pEncoders = static_cast< Gdiplus::ImageCodecInfo* >( _ATL_SAFE_ALLOCA(1040, _ATL_SAFE_ALLOCA_DEF_THRESHOLD)); Gdiplus::DllExports::GdipGetImageEncoders(5, 1040, pEncoders ); CLSID clsidEncoder = pEncoders[4].Clsid; Gdiplus::Bitmap img1((CT2W)L"IMG_1.JPG"); Brighten(&img1); img1.Save((CT2W)L"IMG_1_R3.PNG",&clsidEncoder,NULL); Thanks in advance!

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  • Jquery to slide on load

    - by Pexsol
    I have a simple slider that works on click. How can I automate it so it runs automatically yet keeping the click function as it is? $(document).ready(function() { var currentPosition = 0; var slideHeight = 360; var slides = $('.main-item'); var numberOfSlides = slides.length; var tracker = 0; $('.slider-height').css('height', slideHeight * numberOfSlides); $('.slide-option li a').click(function() { tracker = $('.slide-option li a').index($(this)); $('.slide-option li a').removeClass('current-item'); $(this).addClass('current-item'); //alert(tracker); $('.slider-height').animate({ 'top': slideHeight * (-tracker) }); return false; //alert(tracker); }); });

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  • MSSQL + Copy data from one server database table to the other

    - by lucky
    Hello All, I dont know how to copy table data from one server - database - table TO other sever - database - table. If it is with in the same server and different databases, i have used the following SELECT * INTO DB1..TBL1 FROM DB2..TBL1 (to copy with table structure and data) INSERT INTO DB1..TBL1(F1, F2) SELECT F1, F2 FROM DB2..TBL1 (copy only data) Now my question is copy the data from SERVER1 -- DB1-- TBL1 to SERVER2 -- DB2 --TBL2 Thanks in advance!

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  • Optimizing landing pages

    - by Oleg Shaldybin
    In my current project (Rails 2.3) we have a collection of 1.2 million keywords, and each of them is associated with a landing page, which is effectively a search results page for a given keywords. Each of those pages is pretty complicated, so it can take a long time to generate (up to 2 seconds with a moderate load, even longer during traffic spikes, with current hardware). The problem is that 99.9% of visits to those pages are new visits (via search engines), so it doesn't help a lot to cache it on the first visit: it will still be slow for that visit, and the next visit could be in several weeks. I'd really like to make those pages faster, but I don't have too many ideas on how to do it. A couple of things that come to mind: build a cache for all keywords beforehand (with a very long TTL, a month or so). However, building and maintaing this cache can be a real pain, and the search results on the page might be outdated, or even no longer accessible; given the volatile nature of this data, don't try to cache anything at all, and just try to scale out to keep up with traffic. I'd really appreciate any feedback on this problem.

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  • UIImage Fade in after load on my UITable

    - by Cy
    I have an UIImage that loads from the web, and I'd like it to fade in when it displays in my UITableCell. if([thumb image]) { UIImage *imagen = [thumb.image retain]; [imagen drawInRect:CGRectMake(15, 4, 44, 44)]; [imagen release]; } How could I achieve it?

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  • Eclipse plugin to measure programmer performance/stats

    - by trenki
    Does anyone know of an Eclipse plugin that can give me some stats about my behavior/usage of the Eclipse IDE? There are quite a few things I would like to know: How often/when do I invoke the "Build All" command (through Ctrl+B) How often does compilation fail/succeed (+ number of errors/warnings) How often do I hit Backspace? (I do that way to often; If pressing that key would give a nasty sound I would in time learn to type correctly in the first place) How many characters/lines of code that I typed do I delete (possibly quite immediately) How (effective/efficient/...) is my Mouse/Keyboard/IDE usage? (Kinda like measuring APM in StarCraft; this could be fun) If there is no such Eclipse plugin around, how complex and time consuming would It be to write a plugin that can accomplish the above?

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  • Performance issue between builds

    - by DeadMG
    I've been developing a small indie game in my spare time and have run across an inexplicable issue. Some builds of the game will randomly run several hundred frames per second slower than other builds. For example, when rendering some text and no 3D scene, I can achieve 1800FPS on my own hardware. Add one 3D sphere (10k verts, pixel shaded), achieve 1700 FPS. Add two more spheres, achieve 800 FPS. Remove all spheres, achieve 1100FPS- even though the code now renders the same scene as I previously achieved at 1800FPS, which is just the FPS counter being rendered. I've tried rebuilding and cleaning the project and rebooting the compiler. This is in Release mode and I turned on all the optimizations I could find. Any suggestions as to the cause? I ran a quick profile, and Visual Studio seems to think that over 90% of my time was spent in D3D9_43.dll, suggesting that it's not a bug in my app, which doesn't explain why it manifests in only some builds. I rebooted my machine and it's back up to 1800FPS. I think it's a bug in the DirectX SDK tools (amongst many others). Going to delete this question.

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  • Set the right two characters (if there are any) to capitals?

    - by Hyflex
    Below is my data: Data Here 94/452O Data more 94/4522i Data bla 94/111 Data bla 94/459es Data bla 94/444 items is automatically generated by some previous code but it could come out like: items = ["Data Here 94/452O", "Data more 94/4522i", "Data bla 94/111", "Data bla 94/459es", "Data bla 94/444"] Now currently I'm appending the following: "\n".join(items).replace("4ke", "9") with a few other .replaces however I want it to replace/change the characters on the end of the numbers with a capital letter instead of lowercase... Output: Data Here 94/452O Data more 94/4522I Data bla 94/111 Data bla 94/459ES Data bla 94/444

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