I've been working this issue for a while now and I am open to any best practices/advice. The Example So I created a sample Core Data application. The application is basically a mimic of the AddressBook application. I have the following Entities: Group, Contact, Address, Phone, Email, Webpage, Dates. As you probably are guessing, a Gro...
I am using a simple table with 6 columns, 3 of which are of XML type, not schema-constrained. When the table reaches a size around 120,000 or 150,000 rows, I see a dramatic performance cost in doing any query in the table. For comparison, I have another table, which grows in size at about the same rate, but only contain scalar types (int...
I have a textbox on my web page that is used to specify a date, so I'd like to use the jQuery DatePicker. However, most of my users are locked into using IE6 and the performance of the jQuery DatePicker is a little sluggish in this browser. Can anyone recommend an alternate JavaScript date picker, or any means of improving the display p...
Hi, I'm searching for software to do benchmarking, analysis, performance of code and apps. Something like Intel VTune. Can anyone give me some names, free or payed, targeting c# apps. thanks ...
I need to insert a couple hundreds of millions of records into the mysql db. I'm batch inserting it 1 million at a time. Please see my code below. It seems to be slow. Is there any way to optimize it? try { // Disable auto-commit connection.setAutoCommit(false); // Create a prepared statement String ...
I have two tables posts and comments. Table comments have post_id attribute. I need to get all posts with type "open", for which there are no comments with type "good" and created date MAY 1. Is it optimal to use such SQL-query: SELECT posts.* FROM posts WHERE NOT EXISTS ( SELECT comments.id FROM comments WHERE comments.post_id =...
Hello all, I am trying to make a Java port of a simple feed-forward neural network. This obviously involves lots of numeric calculations, so I am trying to optimize my central loop as much as possible. The results should be correct within the limits of the float data type. My current code looks as follows (error handling & initializati...
Use a Content Delivery Network (CDN) Compress components with gzip Configure entity tags (ETags) Add Expires headers If i don't have access to Apache configuration. ...
I have a large application and I'm going to enabling short-cut key for it. I'd find 2 JQuery plug-ins (demo plug-in 1 - Demo plug-in 2) that do this for me. you can find both of them in this post in StackOverFlow My application is a completed one and I'm goining to add some functionality to it so I don't want towrite code again. So as ...
Hi , I am facing some strange behavior after upgrading my flex project from flex3 sdk to flex4. First the performance has decreased significaly so i did some research and read this: http://opensource.adobe.com/wiki/display/flexsdk/Linking+RSLs+by+Default which says in short the in flex4 all the flex libraries are loaded as rsls to the p...
I have a solution with 21 C++ projects and 1 VB.NET project. The IDE responds very slowly when I simply move the carret in a file or try to open the menu. The process seems to take 50% of CPU for each movement. It only happens with this solution and only on my machine. The solution has total of 2380 source and header files, of which 128...
I am developing 2D game for iphone in Objectice-C.In this project I need to use stack, I can do it using STL(Standard template library) stacks or NSMutableArray, since this stack is widely used in the game which one is more efficient in terms of runtime speed and memory use? @interface CarElement : NSObject { std::stack<myElement*> *m...
If i takes larger datatype where i know i should have taken datatype that was sufficient for possible values that i will insert into a table will affect any performance in sql server in terms of speed or any other way. eg. IsActive (0,1,2,3) not more than 3 in any case. I know i must take tinyint but due to some reasons consider...
Hi all I have been asked to monitor SQL Server (2005 & 2008) and am wondering what are good metrics to look at? I can access WMI counters but am slightly lost as to how much depth is going to be useful. Currently I have on my list: user connections logins per second latch waits per second total latch wait time dead locks per second ...
Hi, I'm facing a performance issue with a crowded combobox (5000 items). Rendering of the drop down list is really slow (as if it was computing all items before showing any). Do you have any trick to make this dropdown display lazy? Xaml code: <Grid x:Name="LayoutRoot"> <StackPanel Orientation="Horizontal" Width="200" Heigh...
I have to use .NET/C# for the next company project. As I've developed my project on Mac, I looked into the mono for development environment/tool. Is the mono for Mac OS X is fast enough? I mean, what about the performance in running the assembly compared to running the same code on .NET under windows machine? Do I have to buy PC laptop...
The following program is essentially the same as the one described here. When I run and compile the program using two threads (NTHREADS == 2), I get the following run times: real 0m14.120s user 0m25.570s sys 0m0.050s When it is run with just one thread (NTHREADS == 1), I get run times significantly better even th...
Which one of below query has better performance? What's the upside/downside for both query? I want to discuss the scenario for inserting 1000 rows and 100k rows Thanks. 1st INSERT INTO table_name (col1,col2) VALUES (value1, value2); INSERT INTO table_name (col1,col2) VALUES (value3, value4); 2nd INSERT INTO table_name SELECT (col1,c...
I am wondering whether watching a file/directory for changes using the FileSystemWatcher class is extremely memory intensive. I am developing a desktop application in C# that will be running behind the scenes continuously on low-performance computers, and I need some way of checking to see if various files have changed. I can think of a ...
My site occasionally has fairly predictable bursts of traffic that increase the throughput by 100 times more than normal. For example, we are going to be featured on a television show, and I expect in the hour after the show, I'll get more than 100 times more traffic than normal. My understanding is that MySQL (InnoDB) generally keeps m...