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  • Performance of DirectX and Recent Windows Mobile Version

    - by Kevin
    I'm seeing very poor performance while using the managed DirectDraw wrappers for WindowsMobile. Microsoft.WindowsMobile.DirectX.Direct3D I would appear the biggest bottle neck is calling Device.Present() after building up the scene. When using the System.Diagnostics.Stopwatch and running this very trivial exmaple Using Sprites on MSDN I'm seeing it's taking approximately 150ms to call the Device.Present() method. I'm seeing this on my AT&T Tilt and on the emulator. In larger applications such as the UltimateGMan sample it's taking over a second to call this method. Does anyone have any experience with using DirectX on mobile devices? What am I missing? I would prefer to stay in the managed world but if I drop back into C++ would I see better performance?

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  • SQL Server 2008 Insert performance issue

    - by mithiya
    is there any way to increase performance of SQL server inserts, as you can see below i have used below sql 2005, 2008 and oracle. i am moving data from ORACLe to SQL. while inserting data to SQL i am using a procedure. insert to Oracles is very fast in compare to SQL, is there any way increase performance. or a better way to move data from Oracle to SQL (data size approx 100000 records an hour) please find below stats as i gathered, RUN1 and RUN2 time is in millisecond.

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  • Why is display:inline killing IE 8.0 performance?

    - by monstermensch
    I have an image gallery based on this jQuery plugin: http://jqueryfordesigners.com/demo/slider-gallery.html This works really well in Firefox, Chrome and even IE 7.0, but when I try it with more than 50 images in IE 8.0 the performance is incredible slow. Just hovering over the thumbnail brings the CPU load to 100%. At first I thought it's a Javascript problem, so I used the IE profiler, but the results were normal. Next I checked the CSS and finally found the cause: .sliderGallery UL LI { display: inline; } This gets the thumbnails to align horizontally. If I chance it to display:block, performance is fine and the scroller is still working but obviously it looks funny, because the thumbs are aligned vertically. My questions: Why does IE 8 have this problem with many display:inline elements What can I do to solve it I'll gladly provide more information if necessary.

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  • Performance of: if (OBJECT_INSTANCE is TYPE)

    - by Axonn
    I am working both in C# and ActionScript 3. Both language are type-aware, so you can do verifications such as: if (some_object_instance is SomeClassName_ThatIs_SomeType) I'm doing these kind of verifications in a few places. Might be a dumb question, but I will ask it anyway, and I want answers from both camps, C# and ActionScript: What goes on behind the scenes? Is it Reflection? If is, isn't this a long verification which might degrade performance if done in thousands of loops? And by "degrade performance" I mean, is it more intensive than say if (Math.sqrt(8) > Math.sin(10))

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  • Multiple Table Joins to Improve Performance?

    - by EdenMachine
    If I have a table structure like this: Transaction [TransID, ...] Document [DocID, TransID, ...] Signer [SignerID, ...] Signature [SigID, DocID, SignerID, ...] And the business logic is like this: Transactions can have multiple documents Documents can have multiple signatures And the same signer can have multiple signatures in multiple documents within the same transaction So, now to my actual question: If I wanted to find all the documents in a particular transaction, would it be better, performance-wise, if I also stored the TransID and the DocID in the Signer table as well so I have smaller joins. Otherwise, I'd have to join through the Signature Document Transaction Documents to get all the documents in the transaction for that signer. I think it's really messy to have that many relationships in the Signer table though and it doesn't seem "correct" to do it that way (also seems like an update nightmare) but I can see that it might be better performance for direct joins. Thoughts? TIA!

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  • Does introducing foreign keys to MySQL reduce performance

    - by Tam
    I'm building Ruby on Rails 2.3.5 app. By default, Ruby on Rails doesn't provide foreign key contraints so I have to do it manually. I was wondering if introducing foreign keys reduces query performance on the database side enough to make it not worth doing. Performance in this case is my first priority as I can check for data consistency with code. What is your recommendation in general? do you recommend using foreign keys? and how do you suggest I should measure this?

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  • Best Performing ORM for .NET

    - by steve_c
    I'm curious if anyone has done any performance comparisons with any or all of the main players in the .NET ORM space. Specifically I'm interested in comparisons between the following: Linq to SQL NHibernate LLBL Gen Entity Framework Though it seems people don't really consider Linq to SQL a true ORM, I am still including it in this list. Some performance metrics would be nice to see.

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  • SQL Server Compact Edition 3.5 performance

    - by Wili
    I am using SQL Server CE 3.5 SP1 in one of my client applications. When a user loads the program and starts using it, performance is fine. If the user lets the program sit idle for a while, it takes a considerable amount of time (10 or more seconds) for the program to respond. Every time the user asks for a new screen, a call is made to the SQL CE database to get the data for that screen. It seems like the hard drive may be going to sleep and then when the database is accessed, the hard drive has to wake back up. Is it possible to load the entire database into memory and work from that? Are there any other suggestions on how to increase performance?

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  • performance issue with a website.

    - by pradeep
    Hi, I have a website .. [SPAM LINK REMOVED]. When you see pages like [SPAM LINK REMOVED] and [SPAM LINK REMOVED]. These pages load a bit slowly in FF. Please see if the speed is reasonable or speed needs to improve and in IE 6 it takes ages to load the website. Please let me know what all should i do to increase the performance of website. I tried all the options given by firebug. But nothing much helped. If any1 can let me know where all i should take care to increase the performance it will be very helpful.

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  • Benchmarks for Single and MultiThreaded programs

    - by user280848
    Hi I am trying to compare the performance of Single and Multithreaded Java programs. Are there any single thread benchmarks which are available which I could then use and convert to their multithreaded version and compare the performance. Could anybody guide me as to what kind of programs(not very small) are suitable for this empirical comparison. Thanks in advance

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  • Spikes of 99% disk activity in Windows 8 Task Manager

    - by Jonathan Chan
    For some reason Windows 8's Task Manager reports spikes of 99% disk activity for hours at a time. Looking at the entries in that column, however, data doesn't seem to be getting written any more quickly than when the disk activity is around 25-50% (which it seem to idle at most of the time). Furthermore, when these 99% disk activity spikes are happening, the average response time reported in the Performance tab becomes 4000-6000ms. Is there a good way to find out what is causing the disk activity? I've tried using Process Explorer, but I said above, the rate at which data is reportedly being written doesn't seem to correspond (Dropbox and Google Chrome are constantly the top two, but the spikes are not dependent on their being open). Thanks in advance for any help. It gets very annoying when the computer stutters to a halt.

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  • How to preserve sysprep from changing Default User settings

    - by user33794
    I'm having diffculties configuring 20 new Dell Vostro minis here. I set up one of them with my preferred OS, applications and settings, especially the Visual Effects Settings of Windows XP. I set them to best performance and deactivated everything else in the box. I copied this profile to Default User Profile and did sysprep -mini -reseal. After capturing this image and deploying it again, the desktop settings are correct except the visual effects settings. fading and everything else is reenabled for each new user which is created on the system. How do I preserve my settings from being overwritten by sysprep? thanks!

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  • Benchmarking MySQL on win7

    - by Patrick
    I've setup a nginx server running php 5.3.6 and mysql 5.5.1.3. My computer is an AMD quadcore 9650, 4gb ram, 500gb 7200rpm HD. I ran the PHP MySQL Benchmark Tool v. 0.1, and got the following results: Testing a(n) MYISAM table using 100000 rows. Successfully created database speedtestdb Sucessfully created table speedtesttable Table Type Verified: MYISAM .. Done. 100000 inserts in 19.73628 seconds or 5067 inserts per second. Done. 100000 row reads in 0.2801 seconds or 357015 row reads per second. Done. 100000 updates in 4.03876 seconds or 24760 updates per second. I'm wondering where this stands as far as performance goes, and what are some steps I can take if any to improve on this. I'm not trying to make anything fantastic, just getting a feel for how to best optimize a web server in this configuration.

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  • CORAID using only 1 of the 2 available NICs for AoE traffic

    - by Peter Carrero
    We got 6 CORAID shelves in my workplace. On 2 of them I see AoE traffic on only 1 of the 2 NICs that are attached to the SAN switch. We got jumbo frames enabled on all devices. Both NICs show up when I issue the aoe-interfaces command. This wouldn't bother me too much if the throughput performance observed on the "bad" shelves using bonnie++ wasn't half of the result of the "good" shelves. The "good" shelves are older SR1521 model and they have ReiserFS on their LUNS - not that I think it makes a difference - and the "bad" shelves are newer SR2421 model and have JFS. Any help as to what is going on and how to rectify this would be greatly appreciated. BTW: even the lower performing shelves outperform another iSCSI device we got, but that is another story... Thanks.

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  • Install 64-bit Ubuntu or 32-bit?

    - by nitbuntu
    I'll be receiving a new notebook in a few days and was planning on running Ubuntu on it as it's compatible and the notebook has no OS pre-installed. The specifications are: Core 2 Duo, T6600, 4 GB RAM, Intel integrated graphics. I know a year or two ago, running a 64-bit version of Ubuntu was not advised due to much of the applications and plugins (e.g. Flash) only running on 32-bit. Is this still the case? Would I get better performance with 64-bit Ubuntu since I have 4 GB of RAM? Are there any downsides anymore?

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  • eSata plugged into Sata socket via adaptor cable very slow

    - by Jon
    Why would an external eSata Drive (xSonic with 500Gb notebook Hard Drive) run ok on a Silicon Image based PCI-E to eSata adaptor at about 35MB/s, But then run really slow when plugged into NForce4 Sata socket via cable? I have another version of the problem with Really slow 1MB/s!!! performance on a ASUS P5K Pro Motherboard with E8400 CPU. This time the same card is plugged into a PCI-E socket. The same eSata drive is plugged into the Esata port on the card. All this is running on Windows XP Pro 32bit. Any suggestions on how to diagnose the problems??

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  • Do Seagate Momentus XT SSD Hybrid drives perform better than a good hard drive + flash on ReadyBoost

    - by Chris W. Rea
    Seagate has released a product called the Momentus XT Solid State Hybrid Drive. At a glance, this looks exactly like what Windows ReadyBoost attempts to do with software at the OS level: Pairing the benefits of a large hard drive together with the performance of solid-state flash memory. Does the Momentus XT out-perform a similar ad-hoc pairing of a decent hard drive with similar flash memory storage under Windows ReadyBoost? Other than the obvious "a hardware implementation ought to be faster than a software implementation", why would ReadyBoost not be able to perform as well as such a hybrid device?

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  • How to monitor current output/receive queue length in Linux

    - by IZhen
    I want to check the capacity and performance of my network. Besides checking the txkB/s and rxkB/s via Sar, I'd also like to see the average queue length of the network interface(so that the average queueing time in the interface can be calculated). It seems that netstat can give a per socket queue length, is it possible to get a per interface statics(a bit like Network Interface\Output Queue Length in Windows)? A related and kind of reverse questions is How do I view the TCP Send and Receive Queue sizes on Windows? Thanks

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  • Full Screen Flash is choppy (nVidia GeForce 8200M)

    - by Joel Martinez
    I have a new compaq presario laptop (I asked SU for advice before I bought it :-) ). It has a nVidia GeForce 8200M video card. When I try to play a flash video full screen, it plays really choppy. This is a brand new computer and is well more powerful than my previous computer so I know it's not a matter of the full screen being too processor intensive to play, or a bandwidth problem. Even playing HD hulu videos full screen was fine on my previous laptop. Any advice on how to get better performance here? edit: World Of Warcraft is able to play at a great framerate, so this machine should definitely be able to handle a simple little flash video ;-)

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  • Different block sizes for partition and underlying logical disk on HP Raid Controller (Linux)

    - by Wawrzek
    Following links collected in this thread I started to check blockdev and found the following output indicating different sizes for partition c0d9p1 and the underlying device (c0d9): [root@machine ~]# blockdev --report /dev/cciss/c0d9 RO RA SSZ BSZ StartSec Size Device rw 256 512 4096 0 3906963632 /dev/cciss/c0d9 [root@machine ~]# blockdev --report /dev/cciss/c0d9p1 RO RA SSZ BSZ StartSec Size Device rw 256 512 2048 1 3906959039 /dev/cciss/c0d9p1 We have a lot of small files, so yes the block size is smaller than normal. The device is a logical driver on an HP P410 raid controller, simple disk without any raid - RAID 0 on one disk to be precise. (Please note that above configuration is a feature not a bug). Therefore, I have the following questions. Can the above discrepancy in the block size affect disk performance? Can I control the block size using hpacucli?

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  • 4096 and 8192 block size read slower than write? by using lsi 9361-8i RAID10

    - by Min Hong Tan
    is it possible that 1024 and 2048 block size read speed is faster than 4096 and 8192 block? I'm using lsi 9361-8i with RAID 10 , with 8 x Kingston E50 250G. result: 1024 = Write: 2,251 MB/s Read: 2,625 MB/s 2048 = Write: 2,141 MB/s Read: 3,672 MB/s 4096 = Write: 2,147 MB/s Read: 231 MB/s 8192 = Write: 2,147 MB/s Read: 442 MB/s is there any possible? and below is the reading when i simply want to test out the RAID 10 function and disaster test by taking out one of the 250G harddisk. the result is different like below: Result: 1024 = Write: 825 MB/s Read: 1,139 MB/s 2048 = Write: 797 MB/s Read: 1,312 MB/s 4096 = Write: 911 MB/s Read: 1,342 MB/s 8192 = Write: 786 MB/s Read: 1,204 MB/s and the result for 4096 and 8192block are different? can any one explain to me is it normal? or I need to do some tuning/configuration? will it affect my host linux performance?

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  • High CPU usage on Linux machine

    - by user305210
    I have a piece of java code running on two different machines, but on one of the linux machines, the code uses alot of CPU (close to 100% cpu usage). On the other machine the same code uses less cpu (under 3 to 4%). The machine where cpu usage is high, is a more powerful machine, more CPU and and more memory. This has started happening recently and performance on the machine with high cpu usage has degraded significantly. I am wondering if anyone has any ideas why something like this could happen, possible causes behind this etc. any guesses? No recent changes in hardware were made, no recent code updates... Thank you.

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