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  • Multidimensional Array with different types in java

    - by Christian
    I want to store a data structure thats a table with one column Strings and another column of Ints. List<Entry<String, Integer>> li = new LinkedList<Entry<String, Integer>>(); would do the job for a list but I would rather have the performance of an array. I tried Entry<String, Integer>[] = new Entry<String, Integer>[10]; but that doesn't seem to work.

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  • Displaying html in a table view cell

    - by Surya
    I am working a rss reader app for iphone . What are my options for displaying entry summary in rss feed ( which could be html) in a tableviewcell without compromising scroll performance . I dont control the feed so html in summary section is out of my control . I am thinking of uiwebview would be my last option ( so rss feeds have images and stuff in there, unfortunately ) . I was thinking if there was a way to extract summary text from html.

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  • Setting up web page width

    - by RPK
    I am new to web-design. I want to set the page-width so that it appears well in a 800x600 resolution screen. I normally use Tables but I read somewhere that excessive use of Tables slows the performance of the website. What other thing I can use and how to set the width?

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  • Complementary language to learn after Python?

    - by BobDobbs
    As a reasonable proficient Python programmer, I'm wondering what a good second language to learn would be. More specifically, something that does well the things that Python doesn't in general do as well. My first guess would be C/C++ since it's got easy extensibility with Python and because it offers generally better performance, but I'm wondering if Java or C# might be a better or at least equivalently good option with different up/downsides compared to C/C++.

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  • Blittable Value Types

    - by Michael Covelli
    Here is a list of blittable types. It contains Int32 and Int64. But I don't see just plain "int" on the list. How does C# treat the plain "int" type? Does it just get replaced with Int32 or Int64 depending on the system? Or is there a subtle difference? Will using "int" ever cause a performance hit for marshalling?

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  • Why use NoSQL over Materialized Views?

    - by JustinT
    There has been a lot of talk recently about NoSQL. The #1 reason why I hear people use NoSQL is because they start to de-normalize their DBMS data so much so, to increase performance, that they end up with just one table with all of their data within that single table. With Materialized Views however, you can keep your data normalized, yet have it stored as a single table view for the same reasons why you'd use NoSQL. As such, why would someone use NoSQL over Materialized Views?

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  • Cloud computing?

    - by Shawn H
    I'm an analyst and intermediate programmer working for a consulting company. Sometimes we are doing some intensive computing in Excel which can be frustrating because we have slow computers. My company does not have enough money to buy everyone new computers right now. Is there a cloud computing service that allows me to login to a high performance virtual computer from remote desktop? We are not that technical so preferrably the computer is running Windows and I can run Excel and other applications from this computer. Thanks

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  • KPI definition asking for advice

    - by George2
    Hello everyone, I am looking for some reference/samples about how to define good KPI for education industry. I want to define KPI from school/department management perspective to measure various school performance, students/faculty/others. Any advice, referneces or documents are appreciated -- more appreciated if with the context of SQL Server 2005/2008. thanks in advance, George

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  • How to give CSS3 support to IE?

    - by metal-gear-solid
    I use IE7.js but it doesn't have CSS3 support. I use jQuery always in my projects. What is the best lightweight way to give all CSS3 selectors and properties support to IE 6,7,8? I'm not asking for HTML5 support only asking to give CSS3 support in as much as light on performance way.

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  • PHP - CURL vs fopen vs fsocketopen ?

    - by TatMing
    I would write a WordPress plugin to parse all image source and check it's broken link or not. My idea is : Select all post&page's images by regex from MySQL Navigate the image url and get the response header (404 ,403 error etc) print a report Since i don't need actual to download the binary file, so in performance ,compare in CURL , fopen , fsocketopen Which one is worst to use? And one more question, which method can execute in multi-thread?

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  • JSON Rpc libraries for use with .NET

    - by Deeptechtons
    I am looking into JSON RPC libraries for .net that are free to use in commercial applications. Up until now i just seem to have found JROCK. What other libraries, architecture have i got similar to JRock for .NET 2.0 What is the difference between a [WebMethod] in asmx web-service returning a instance of a class and a JSON Rpc method as in the JRock website page. Do i have any usability benefits, performance benefits or any benefits of using one over the other

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  • Asynchronous I/O on Mac OS X

    - by stas
    Hi, Meaning the C10K problem, what is the best way to do asynch I/O on Mac OS X (assume to use on Mac and iPhone/iPad)? On Linux our choice is epoll, on Windows is I/O Completion Ports. Top priority is performance and scalability (thousands of connections). Thanks

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  • CDNs and domains

    - by Martind
    Hi all! A lot of big websites (facebook etc) are settings up CDN's for their content. Now I notice, that these CDN's are not always on the original domain. Example: Facebook pictures are on "photos-a.ak.fbcdn.net" Why is that? Is there a performance-gain in not having lots of subdomains on the "primary" domain (facebook.com)

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  • .Net Com Interop Create Instance Slow

    - by B Z
    I have a .net 4 application that uses a Com Dll to send SMS messages. I used TlbImp to create the interop assembly and that is what is referenced in the application. When I try to create an instance of this class, it takes a really long time (2-5 seconds). I ran performance profile in VS 2010 and the call that takes the longest by far is System.Activator.CreateInstance(). I am looking for tips on how to debug or gotchas with using Com Interop.

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  • realtime diagnostics

    - by Ion Todirel
    I have an application which has a loop, part of a "Scheduler", which runs at all time and is the heart of the application. Pretty much like a game loop, just that my application is a WPF application and it's not a game. Naturally the application does logging at many points, but the Scheduler does some sensitive monitoring, and sometimes it's impossible just from the logs to tell what may have gotten wrong (and by wrong I don't mean exceptions) or the current status. Because Scheduler's inner loop runs at short intervals, you can't do file I/O-based logging (or using the Event Viewer) in there. First, you need to watch it in real-time, and secondly the log file would grow in size very fast. So I was thinking of ways to show this data to the user in the realtime, some things I considered: Display the data in realtime in the UI Use AllocConsole/WriteConsole to display this information in a console Use a different console application which would display this information, communicate between the Scheduler and the console app using pipes or other IPC techniques Use Windows' Performance Monitor and somehow feed it with this information ETW Displaying in the UI would have its issues. First it doesn't integrate with the UI I had in mind for my application, and I don't want to complicate the UI just for this. This diagnostics would only happen rarely. Secondly, there is going to be some non-trivial data protection, as the Scheduler has it's own thread. A separate console window would work probably, but I'm still worried if it's not too much threshold. Allocating my own console, as this is a windows app, would probably be better than a different console application (3), as I don't need to worry about IPC communication, and non-blocking communication. However a user could close the console I allocated, and it would be problematic in that case. With a separate process you don't have to worry about it. Assuming there is an API for Performance Monitor, it wouldn't be integrated too well with my app or apparent to the users. Using ETW also doesn't solve anything, just a random idea, I still need to display this information somehow. What others think, would there be other ways I missed?

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  • What should be the ideal number of parallel java threads for copying a large set of files from a qua

    - by ukgenie
    What should be the ideal number of parallel java threads for copying a large set of files from a quad core linux box to an external shared folder? I can see that with a single thread it is taking a hell lot of time to move the files one by one. Multiple threads is improving the copy performance, but I don't know what should be the exact number of threads. I am using Java executor service to create the thread pool.

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  • safari 5 resize flash application

    - by dome
    Just notice that after updating to Safari 5 (mac) all the flash applications that respond to resize events got sluggish. try: http://www.tutorio.com/media/flash/liquid-demo.html this works great with firefox 3.6.3, Chrome can deal with it fine, although not so fast as Firefox, but new Safari gives a awful experience, distorting all content if you do fast resizing. Any ideas why is this happening / and how can I get a better performance with safari browsers?

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  • Components for creating Archives

    - by John
    Hello, I'm searching for a simple,free component for creating archives with the capability of adding files to an already existing archive.Compressions is not a matter as much as performance so even "store" will be useful. Please help me find one.

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  • Scalability comparison between different DBMSs

    - by Björn Lindfors
    By what factor does the performance (read queries/sec) increase when a machine is added to a cluster of machines running either: a Bigtable-like database MySQL? Google's research paper on Bigtable suggests that "near-linear" scaling is achieved can be achieved with Bigtable. This page here featuring MySQL's marketing jargon suggests that MySQL is capable of scaling linearly. Where is the truth?

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  • Basic principles of computer encryption?

    - by Andrew
    I can see how a cipher can be developed using substitutions and keys, and how those two things can become more and more complex, thus offering some protection from decryption through brute-force approaches. But specifically I'm wondering: what other major concepts beyond substitution and key are involved? is the protection/secrecy of the key a greater vulnerability than the strength of the encryption? why does encryption still hold up when the key is 'public' ? are performance considerations a major obstacle to the development of more secure encryption?

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  • Best practice for viewflipper containing 10 linearlayouts?

    - by Brad Hein
    I'm embarking on a GUI Activity composed of a viewflipper, which I would like to contain 10 linearlayout layouts. Is it advisable to put all of my layouts into the same XML resource/layout file? If not, is there a more organized approach to coding a viewflipper with many layouts? Will having everything in the same file come at a significant performance cost?

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  • What are the benefits of left outer join vs nested aggregate selects to find the newest rows in a table?

    - by RenderIn
    I'm doing: select * from mytable y where y.year = (select max(yi.year) from mytable yi where yi.person = y.person) Is that better or worse from a performance aspect than: select y.* from mytable y left outer join mytable y2 on y.year < y2.year and y.person = y2.person where y2.year is null The explain plan/anecdotal evidence is inconclusive so I am wondering if in general one is better than the other.

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  • Books or resources for high-loaded sites.

    - by Alex
    Currently I'm developing high-loaded financial portal(we use LAMP to run our project). There are great number of incoming data to be processed and stored. So optimization tasks become very important for us. Could you suggest books, articles or resources, that discover optimization questions (especially bboks). NOTE: At the moment I'm reading great book High Performance MySQL, but besides I want to know other facilities of optimization.

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