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  • WinForms ReportViewer: slow initial rendering

    - by Bryan Roth
    UPDATE 2.4.2010 Yeah, this is an old question but I thought I would give an update. So, I'm working with the ReportViewer again and it's still rendering slowly on the initial load. The only difference is that the SQL database is on the reporting server. UPDATE 3.16.2009 I have done profiling and it's not the SQL that is making the ReportViewer render slowly on the first call. On the first call, the ReportViewer control locks up the UI thread and makes the program unresponsive. After about 5 seconds the ReportViewer will unlock the UI thread and display "Report is being generated" and then finally show the report. I know 5 seconds is not much but this shouldn't be happening. My coworker does the same thing in a program of his and the ReportViewer immediately displays the "Report is being generated" upon any request. The only difference is that the reporting server is on one server and the data is on another server. However, when I am developing the reports within SSRS, there is no delay. UPDATE I have noticed that only the first load of the ReportViewer takes a long time; each subsequent load of the same or different reports loads fast. I have a WinForms ReportViewer that I'm using in Remote processing mode that can take up to 30 seconds to render when the ReportViewer.RefreshReport() method is called. However, the report itself runs fast. This is the code to setup my ReportViewer: rvReport.ProcessingMode = ProcessingMode.Remote rvReport.ShowParameterPrompts = False rvReport.ServerReport.ReportServerUrl = New Uri(_reportServerURL) rvReport.ServerReport.ReportPath = _reportPath This is where the ReportViewer can take up to 30 seconds to render: rvReport.RefreshReport()

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  • Slow select when inserting large amounts of data (MYSQL)

    - by siannopollo
    I have a process that imports a lot of data (950k rows) using inserts that insert 500 rows at a time. The process generally takes about 12 hours, which isn't too bad. Normally doing a query on the table is pretty quick (under 1 second) as I've put (what I think to be) the proper indexes in place. The problem I'm having is trying to run a query when the import process is running. It is making the query take almost 2 minutes! What can I do to make these two things not compete for resources (or whatever)? I've looked into "insert delayed" but not sure I want to change the table to MyISAM. Thanks for any help!

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  • WPF Using commands to slow to update UI controls

    - by toni
    Hi, I bind a command to a button through command property and doing a command binding in the page it is placed. In execute method I create an instance of a class that contains the background worker and I start it (this is a long task). The background worker (bw) class contains a variable isRunning that it is set to true before DoWork method is executed and to false when RunWorkerCompleted is executed. So from the code behind of the page where button is placed, in CanExecute method I set e.canExecute to true if bw is no running (isRunning = false), and e.canExecute to false if isRunning = true. WHen I press the button, it launch bw process for a long time and the button gets disabled. Ok this is correct, but when background worker (bw) finishes, the button doesn't returns to enabled until I press it again. When it is disabled and I press (when bw is finished) it gets enabled. Why the button is not returning automatically to enabled at the end of the bw? my code snippet: <Page x:Class="GParts.Pages.MyPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes; assembly=PresentationFramework.Aero" xmlns:local="clr-namespace:GParts" Loaded="Page_Loaded" Unloaded="Page_Unloaded" Height="Auto"> <Page.CommandBindings> <CommandBinding Command="{x:Static local:Pages.MyPage.rcmd}" Executed="CommandBinding_Executed" CanExecute="CommandBinding_CanExecute"/> </Page.CommandBindings> <...> <Button Command="{x:Static local:Pages.MyPage.rcmd}" /> <...> </Page> The code behind of the page: namespace GParts.Pages { public partial class MyPage : Page { public static RoutedCommand rcmd = new RoutedCommand(); private cBgWorker bw; <...> // ExecutedRoutedEventHandler for the custom button remove all command. private void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e) { // get an isntance of the background worker class bw = new cBgWorker(); // start the long task bw.StartTask(); } // CanExecuteRoutedEventHandler for the custom button remove all command. private void CommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e) { // bw is the instance of background worker class if (bw == null) { e.CanExecute = true; } else { e.CanExecute = !bw.isRunning;// isRunning indicates if bw is //executing now } } <...> } // end class } // end namespace

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  • Rails initializes extremely slow on ruby 1.9.1

    - by Ben Johnson
    I just got my rails 2.3.8 app running on ruby 1.9.1. To get into the console, start the webserver, anything that initializes rails, takes 3 - 4 times longer in ruby 1.9 than in ruby 1.8.7. I'm using ruby version managers so I can easily switch between ruby 1.9 and ruby 1.8.7. The speed difference happens in both production and development. I want to use 1.9 because its must faster once everything is running, but the startup time is so bad the app is timing out on Heroku on the first request. Any ideas why ruby 1.9 would be 3 - 4 times slower? I can't figure it out for the life of me.

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  • Slow MySQL Query Breaking my back!

    - by Chris n
    so, I have tried everything I can think of, and can't get this query to happen in less than 3 seconds on my local server. I know the problem has to do with the OR referencing both the owner_id and the person_id. if I run one or the other it happens instantly, but together with an or I can't seem to make it work - I looked into rewriting the code, but the way the app was designed it won't be easy. is there a way I can call an equivalent or that won't take so long? here is the sql: SELECT event_types.name as event_type_name,event_types.id as id, count(events.id) as count,sum(events.estimated_duration) as time_sum FROM events,event_types WHERE event_types.id = events.event_type_id AND events.event_type_id != '4' AND ( events.status!='cancelled') AND events.event_type_id != 64 AND ( events.owner_id = 161 OR events.person_id = 161 ) GROUP BY event_types.name ORDER BY event_types.name DESC; Here's the Explain soup, although I'm guessing it's unnecessary cause there is probably a better way to structure that or that is obvious: thanks so much! chris. +----+-------------+-------------+-------+---------------------------------------------------------------------------------------------------------+-------------------------------+---------+-------------------------------------+------+----------------------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------------+-------+---------------------------------------------------------------------------------------------------------+-------------------------------+-- | 1 | SIMPLE | event_types | range | PRIMARY | PRIMARY | 4 | NULL | 78 | Using where; Using temporary; Using filesort | | 1 | SIMPLE | events | ref | index_events_on_status,index_events_on_event_type_id,index_events_on_person_id,index_events_on_owner_id | index_events_on_event_type_id | 5 | thenumber_production.event_types.id | 907 | Using where | +----+-------------+-------------+-------+---------------------------------------------------------------------------------------------------------+-------------------------------+---------+-------------------------------------+------+----------------------------------------------+

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  • rails using jruby 1.5 - slow!!

    - by gucki
    Hi! I'm currently using passenger with ree 1.8.7 in production for a rails 2.3.5 project using postgresql as a database. ab -n 10000 -c 100: 285.69 [#/sec] (mean) I read jruby should be the fastest solution, so I installed jruby-1.5.0.rc2 together with jdbc postgres adapter and glassfish. As the performance is really poor, I also started running my application using "jruby --server -J-Druby.jit.threshold=0 script/server -e production". Anyway, I only get ab -n 10000 -c 100: 43.88 [#/sec] (mean) Thread_safe! is activated in my rails config. Java seems to use all cores, cpu usage is around 350% (top). ruby -v: jruby 1.5.0.RC2 (ruby 1.8.7 patchlevel 249) (2010-04-28 7c245f3) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_16) [amd64-java] I wonder what I'm doing wrong and how to get better performancre with jruby than with ree? Thanks, Corin

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  • Is this slow WPF TextBlock performance expected?

    - by Ben Schoepke
    Hi, I am doing some benchmarking to determine if I can use WPF for a new product. However, early performance results are disappointing. I made a quick app that uses data binding to display a bunch of random text inside of a list box every 100 ms and it was eating up ~15% CPU. So I made another quick app that skipped the data binding/data template scheme and does nothing but update 10 TextBlocks that are inside of a ListBox every 100 ms (the actual product wouldn't require 100 ms updates, more like 500 ms max, but this is a stress test). I'm still seeing ~10-15% CPU usage. Why is this so high? Is it because of all the garbage strings? Here's the XAML: <Grid> <ListBox x:Name="numericsListBox"> <ListBox.Resources> <Style TargetType="TextBlock"> <Setter Property="FontSize" Value="48"/> <Setter Property="Width" Value="300"/> </Style> </ListBox.Resources> <TextBlock/> <TextBlock/> <TextBlock/> <TextBlock/> <TextBlock/> <TextBlock/> <TextBlock/> <TextBlock/> <TextBlock/> <TextBlock/> </ListBox> </Grid> Here's the code behind: public partial class Window1 : Window { private int _count = 0; public Window1() { InitializeComponent(); } private void OnLoad(object sender, RoutedEventArgs e) { var t = new DispatcherTimer(TimeSpan.FromSeconds(0.1), DispatcherPriority.Normal, UpdateNumerics, Dispatcher); t.Start(); } private void UpdateNumerics(object sender, EventArgs e) { ++_count; foreach (object textBlock in numericsListBox.Items) { var t = textBlock as TextBlock; if (t != null) t.Text = _count.ToString(); } } } Any ideas for a better way to quickly render text? My computer: XP SP3, 2.26 GHz Core 2 Duo, 4 GB RAM, Intel 4500 HD integrated graphics. And that is an order of magnitude beefier than the hardware I'd need to develop for in the real product.

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  • Subsonic linq using activerecord very slow compared to simplerepository

    - by skiik
    Anyone know anything about why linq queries are about 6 times slower when querying using active record vs simplerepository? The below code runs 6 times slower than when i query the data using a simple repository. This code is executed 1000 times in a loop Thanks in advance string ret = ""; // if (plan == null) { plan =VOUCHER_PLAN.SingleOrDefault(x => x.TENDER_TYPE == tenderType); } if (plan == null) throw new InvalidOperationException("voucher type does not exist." + tenderType); seq = plan.VOUCHER_SEQUENCES.First(); int i = seq.CURRENT_NUMBER; seq.CURRENT_NUMBER += seq.STEP; seq.Save();

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  • SQL Server insert slow

    - by andrew007
    Hi, I have two servers where I installed SQL Server 2008 Production: RAID 1 on SCSI disks Test: IDE disk When I try to execute a script with about 35.000 inserts, on the test server I need 30 sec and instead on the production server more than 2 min! Does anybody know why such difference? I mean, the DB is configured in the same way and the production server has also a RAID config, a better processor and memory... THANKS!

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  • VS2008 is very slow on a specific large C++ solution

    - by VioletRose
    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 1280 are header files. I tried to remove all connection to the source control (Perforce) but it didn't help. Also, I have Visual Assist installed but even after removing it (uninstall), the same behavior continued. Any idea?

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  • Why is writing to my external hard drive slow, while benchmarks show fast writing?

    - by matix2267
    I have an iOmega eGo 320GB portable drive connected through USB2.0 to my laptop running Windows Vista. It's been working fine for quite some time until recently it became very slow when writing e.g. when copying ~300MB movie over to the drive at first it is extremely fast but it actually doesn't write it only puts in cache and then hangs on last 10-20MBs for about a minute. When copying larger files it's the same story: starts fast but then slows down to ~5MB/s (sometimes even slower down to 2MB/s). Strange thing is that I have always had caching disabled for this drive (it was disabled by default and I never bothered changing it). At first I thought that the disk is dying so I checked S.M.A.R.T. values and everything is fine there. I also run chkdsk and it seemed to fix the problem - it worked fast for a few minutes but then it slowed down again. I also tried plugging it into another USB port - no difference. Additionally I noticed that reading under certain circumstances is sometimes slower e.g. loading times for some games are ~10 times longer, whereas simple copying files from this drive to my internal HDD is fast. I ran a speed benchmark using CrystalDiskMark with a 5x100MB run and strangely got these results: read write (MB/s) Seq 33.05 28.25 512k 17.30 15.27 4k 0.267 0.372 4kQD32 0.510 0.260 This is different from what most other people have (I've found many threads about slow disk write while googling but all of them were slow on benchmarks too) which is why I decided to post this problem here. BTW most of the time when writing (or sometimes reading) the activity led is mostly idle (blinks a while and then stops for longer, sometimes has slower blinks ~1 sek, sometimes goes off for a few seconds - extremely long blink :) ) but when benchmarking, defragmenting or just reading (copying from this drive, installing apps from installers there, watching HD videos) it is blinking really fast (like it should) and there are no slowdowns. It shouldn't be driver issue unless stock Windows drivers have some issues I'm not aware of.

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  • What is the proper way of debugging a slow Windows installation?

    - by Niklas
    You know the drill - you've been asked to check why you cousin's computer is running slow. I was there yesterday. Being a Mac user since 2007 I haven't really dug deep in Windows internals in the past five years. Googling for answers reveals many, many different answers: broken registry, spyware, antivirus program, fragmented disk, turning of visual effects etc. In this particular case I was asked to look at a two year old HP laptop with Vista. Windows was running incredibly slow and even opening up a new explorer window took almost a minute. I ended up doing everything of the above: running cc cleaner, defragmenting the disk, turning off visual effects, turning off norton and a bunch of other things people believe have an impact on Windows performance. Now I'd like to understand this in depth. Is there a proper, "scientific" if you so will, way of debugging and understanding where the problem with a slow running Windows installation lies? (In my particular case this concerned Windows Vista but let's try to create general guide for XP and Windows 7 too). To me, it seems wrong to just run a bunch of different tools without understanding the underlying cause of the error.

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  • Why does my computer slow down so much when attaching Bluetooth dongle?

    - by Jeff Yates
    I have a Bluetooth dongle and I plugged it into my work laptop (a Dell Latitude D830). Windows detects the Generic Bluetooth USB or similar and then proceeds to go incredibly slow with a process, avp.exe¹, taking 50% CPU. The System Idle process is getting most of the other 50% CPU and the avp.exe process is only at Normal priority. The machine doesn't seem to recover, so I had to turn the power off and reboot. Now, I haven't installed the drivers yet for the device, which I am doing now and I expect it to resolve the problem, so I am not asking how to fix this. I would rather know why Windows goes so slow in the first place. What is it trying to do and failing at so badly that it barely crawls? ¹ Part of Kaspersky Internet Security suite

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  • Why won't Google Chrome open Google Docs, and why is it slow with GMail?

    - by Philip
    OSX 10.6 Snow Leopard: Google Chrome works like a charm most of the time. I have many extensions installed, and I've tried disabling/re-enabling them one by one to find a culprit, with no luck. Here are the problems: (1) Chrome is slow to load GMail. I am fairly sure that clearing the cache alleviates this problem. But I can open Safari, type in the URL, and login to GMail in the time it sometimes takes Chrome to open the page. Shouldn't caching help the page load?!? And sometimes even after recent cache clears it still is slow to load..... Thoughts? (2) Chrome won't open Google Docs at all. Safari does. Again, I tried disabling extensions one-by-one, and I allow cookies and even third-party cookies. But I still am told it has a redirect loop. Any help would be much appreciated. Thanks!

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  • Bullet Time in Real Life: Impacts Slowed Down with High Speed Cameras

    - by Jason Fitzpatrick
    Combine a little shooting range fun with a camera capable of shooting a million frames per second and you’ve got yourself the basis of pretty hypnotizing video. In the video above various rifle and handgun rounds are fired at a variety of materials–sheet metal, plate metal, gelatin–and captured in a halo of fragments and splatters. Have an equally enthralling high speed video to share? Throw a link in the comments! [via Mashable] How To Be Your Own Personal Clone Army (With a Little Photoshop) How To Properly Scan a Photograph (And Get An Even Better Image) The HTG Guide to Hiding Your Data in a TrueCrypt Hidden Volume

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  • Can .htaccess slow down a site?

    - by Cody Sharp
    I'm working with a client on an e-commerce website. I implemented clean URLs using .htaccess. I also used .htaccess to solve canonical issues such as redirecting www to non-www and removing index.php from the URL. The website recently began to slow down dramatically, sometimes not even loading. The site is hosted on GoDaddy, and when the client called GoDaddy they told him it was the .htaccess file slowing down the website. I find this highly unlikely because of my past experiences, but I'm not 100% sure. My thinking is that the client's website is most likely on a shared server with a busy neighborhood, thus slowing down the site. It's not always slow, but rather sporadic throughout the day, loading fast at some points and slow at other points in time. Can the .htaccess file slow down a website to a crawl? If so, are there better ways to solve these problems with different rewrite rules and such? Here is what the actual .htaccess file looks like: Options +FollowSymlinks RewriteEngine On RewriteBase / RewriteCond %{HTTP_HOST} ^www.example.net [NC] RewriteRule ^(.*)$ http://example.net/$1 [L,R=301] RewriteRule ^products/([0-9a-zA-Z\_\-]*)\.htm([l]?)$ index.php p=product&product_code=$1 [L] RewriteRule ^catalog/([0-9a-zA-Z\_\-]*)\.htm([l]?)$ index.php p=catalog&catalog_code=$1 [L] RewriteRule ^pages/([0-9a-zA-Z\_\-]*)\.htm([l]?)$ index.php?p=page&page_id=$1 [L] RewriteRule ^index\.htm([l]?)$ index.php?p=home [L] RewriteRule ^site_map\.htm([l]?)$ index.php?p=site_map [L] RewriteCond %{QUERY_STRING} ^p=home$ RewriteRule (.*) ? [R=permanent] I'm a .htaccess and regex novice, so any pointed out mistakes would also help. Thank you.

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  • Usb stick too slow to benchmark?

    - by user85340
    I have a Core 2 Duo [email protected] with 3GB RAM. After some time using XUbuntu 10.10 on an 8GB stick I decided to switch to 12.04 and put it onto a 32GB stick (Transcend). I use an EXT4 with no journalling, noatime etc set. /tmp and /run is using tmpfs. And it is REALLY slow. MUCH slower than the old Xubuntu on the 8GB stick. Starting takes minutes, all applications "fade" because they respond too slow. I first thought that the NVidia graphics card is responsible for this, because there seem to be some known problems with that. Doing the adjustment (uncheck the sync checkbox) did not help. I believe the root cause is that the access to the USB stick is extremely slow. Running the read benchmark of the disk utility then brought the message "disk is too slow to benchmark"! BUT: When I do the same benchmark with the live CD I get around 20MB read performance and have a very responsive system! So how can I find out what is going one here?

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  • Broadcom BCM4313 wireless slow and high-latency

    - by Florin Andrei
    Ubuntu 12.10 64 bit on a Dell Latitude E6330 laptop. Wireless is pretty slow. It gets connected quick enough, but then it acts like a dialup connection. My ssh sessions over WiFi are slow and laggy. Even browsing is slow, the pages are loading like it's 1998. This does not depend on the access point, it's the same both at home and at work. Other systems work fine on these access points. I had an older Dell laptop before, different WiFi hardware, and it was much faster over the same wireless access points. Is this a known issue with this hardware? If so, any solutions?

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  • How a Hard Drive Works in Slow Motion [Video]

    - by Asian Angel
    This short video lets you have a good luck at a hard drive in slow motion as the actuator arm moves across the disk and then water is added to the equation as well… How a Hard Drive works in Slow Motion – The Slow Mo Guys [via BoingBoing] HTG Explains: What Is Two-Factor Authentication and Should I Be Using It? HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux

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  • Minecraft: Slow performance OUT of the game

    - by blackn1ght
    I downloaded Minecraft yesterday to see what the fuss is about, brilliant game! When playing in Windowed mode, if I try and do anything else, i.e. use the computer, when the game is paused, the computer is incredibly slow, it takes a minute just to type a short message into empathy. Also, once I quit the game, the computer remains slow for about 5 minutes, until it magically frees up and becomes fast again. Could this be related to the 512mb RAM limitation of Java, and the machine is swapping? Even trying to submit this post is incredibly slow and frustrating, it's taking me a minute just to click in the 'Tag's box. Any ideas? Ubuntu 10.10 x64 Intel Q9550 4GB RAM nVidia 8800GTS 320mb (w/prop drivers installed)

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  • SSMS Slow To Save

    - by Bunch
    When using SSMS 2008 I found it to be really slow when trying to save a file, even a small one with just some simple SELECT statements on it. The symptoms were the flashing save disk icons in the lower right corner and selecting the location to save in the Save File dialog would hang each time I picked a location (e.g. Libraries, a folder). This was the first I had seen anything like this where it was really, really slow. It ended up that a server had died last week and I was still mapping a drive to it. SSMS was still trying to connect to it causing the slow down (further information here and here). Once I removed that the save functionality worked like it should. Tags: SQL

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  • Downloads on Vista Home Premium start off fast but slow down to 0 Kb/s and hang

    - by user66265
    I have Windows Vista Home Premium on my computer and everytime I go to download something, it starts out at about 1.5 Mb/s and stays there for about 3 seconds, then it slows down to 800 Kb/s and continues to drop until it gets down to 0 Kb/s and hangs. I've tried just about everything I can find such as uninstalling all firewalls/antivirus, doing the netsh rss,autotune, and chimney disable, and updating everything but it still continues to happen. I'd prefer not to reinstall but if I have to then I have to... EDIT: Figured it out, the router needed a firmware update

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  • iPhone Lag Terrible - SLOW - What's going on with the iPhone OS?

    - by Sam Schutte
    I've had my iPhone 3G for about a year now, and it seems like at least once a month, it gets bogged down and gets slower and slower - horrible lag when typing, going back to the home screen or opening an app can take 20 seconds. Has anyone else run into this and found "the" solution. What you always read on other boards is to reboot the handset (hold down home and the power button), but that doesn't improve anything for me. I've reinstalled the OS like 5 times now, and I'm getting pretty sick of doing it so often. And I don't buy that it's a hardware issue really, since it works fine for weeks after a fresh install. Anyone have a solution or an idea of what specific actions cause this kind of evident data corruption (OS corruption?) and slowness? Note - I'm looking for specific things here. That is, has anyone done the research to see exactly what on the phone operating system is getting messed up that causes this lag (which is discussed all over the internet, with no working solutions). I don't own a mac, so I can't delve into the guts of the iPhone very well to see what's up with it... Some additional info: Reboots (hold down power/home) and "Sleeps" (slide off) do nothing. Only fresh re-installs help I only have about 15 apps installed - sometimes you see the answer to uninstall apps if you have too many, I'd hope that 15 isn't too many, and even when I've had none installed, it still gets hung up after a period of time. This phone is not jailbroken, and it is running the 3.0.1 release.

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