Jpg painting slow

i have a program that scales jpg images and then paints them to a jpanel. I have noticed that some of the jpg's take up to 15 seconds to paint. The jpg files that paint slowly are not more than 150kb with a resolution of 800 x 600. the slow painting only happens the first time the pictures are drawn. ie: once the program has made through the array and starts over the ones that painted slowly now paint quickly as the rest do.
Can anyone shed some light on the problem.
Thanks,
Happy Holidays

i did some adjustment of pic resolution sizes. it seems that anything above or below 800X600 paints as it should
??

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Painting slow

Hello everybody!
I have a problem with painting in my canvas. I�m trying to do something like a Flash presentation.
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My way of doing that is calling a method for waiting between the calls of the repaint for each canvas.
The problem is all the canvas get paint at the same time and not one by one, or, at least all the canvas are displaying at the same time and what I want is the canvas to be displayed slowly.
Can anybody help me???
thx and sorry for my english

First of all you should mix AWT components with Swing components. Use a JComponent of JPanel to hold you images.
big JPanel With 12 canvas and I want to paint the first canvas,Use a [url http://java.sun.com/docs/books/tutorial/uiswing/layout/visual.html]Card Layout to hold individual components
Then use a [url http://java.sun.com/docs/books/tutorial/uiswing/misc/timer.html]Swing Timer to change the component as required.

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Elements revel agent:Upload from jpg pictures slow, no "stopped" at 711 changes

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Gerald5,
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How to increase painting performance ?

First off all, i'd like to apologize for my poor english, because I'm from brazil, and even knowing very well how to speak english, my spelling sometimes comes out really nasty.
Now getting to the subject... ;^)
I study computer science here in brazil, and during a course of data structures, I once saw this stunting applet( a kind of visualization application for AVL trees ) located at: http://www.seanet.com/users/arsen/avltree.html. Since then, I've tried to make something similar to this applet, because I thought that it would be a great experience to do something like that. And I've achieved that. However, like in everything that we do, we encounter some trouble in the way.
First, i tried to develop my own visualization of AVL trees program by using the C language, toghether with the old Borland Turbo C BGI graphics library. It was fine, but i wasn't satisfied 100% with it. Then I've decided to develop it in Java too. I had to make several changes in the algorithms responsible for rendering the tree when I wrote the program in Java, because I wasn't doing the things in the C version in a very smart way. However, the Java version was really improved and is pretty efficient.
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I've tried to set a clipping area in order to perform the drawing faster and improve it's performance, but it didnt worked as I expected. The wanted performance is still unachieved.
You'll know what I'm talking about if you download the program and play with it ...
I don't know what to do ... I'm thinking to create offscreen images of the tree, but I've read that the swing components already are double buffered.
I would publish the source code of the application for you to examine, but I think it wouldn't be useful, because the code is well documented, sadly, in Portuguese. So for you to get along with it, would take a long time ....
One thing thar I've noticed is that Visual Paradigm 3.0( http://www.visual-paradigm.com ) is made in java, and the diagrams sheets are nicely rendered ... what the developers of visual paradigm may have done to improve the performance of the drawing of the diagrams ? Cause they render realy fast, dont matter the size of the panel holding the diagram...
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you can download the C version of my visualization program at: http://planeta.terra.com.br/informatica/jdesign/pessoal/AVL.zip
you can download the java version of my visualization program(executable jar) at: http://www.jdevelop.thefreeserver.com/ArvoresArvl.jar
you can view a brief explanation of the visualization program at: http://www.jdevelop.thefreeserver.com/avl_tree.html
Note: the java version has few known bugs, however they dont affect the performance of the painting and i'm working on them.
If you are brave enought and want to try analising the source code, ask me for it by emailing me at: [email protected]
Thanks in advance,
Julio Cesar de Andrade Vieira Lopes
[email protected]

i'm sorry .... the correct link to download the java program is:
http://www.jdevelop.thefreeserver.com/ArvoresAvl.jar

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hi
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about 200 pictures in my hard disk shown correctly yesterday
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From the error descriptions you have listed it sounds like you may have suffered some sort of disk corruption. Do you have backups or alternative copies of these files? Are you seeing similar issues with other file types?
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@jaspnwarren
jasonwarren.ca
habaneroconsulting.com/Insights

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I just got the 2 GB Upgrade Kit from Crucial for $120 /w free shipping. Came to about $130 after tax.
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Lightroom LR4 - Silly RAM usage!!
Edit Subject
Lightroom LR4 - Silly RAM usage!!
Hi there
I'm stunned at the amount of RAM usage by LIghtroom. I have 6Gb of RAM using LR4 in 64 bit win7.
This is what happened when I opened lightroom to edit a shoot of jpgs, all of which were only about 3mb each ( I wasn't even editing 30Mb RAW files from my DSLRs )
[i]figures from task manager/performance pane[/i]:
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Very soon, after only a few pics, the RAM usage is up to 5.5GB
This seems very disproportionate. Why for example would simply selecting another 3mb jpg eat up another 200Mb of RAM? And why after only a bit of editing on this 3mb pic in the develop module eat up another 900Mb of RAM?
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OK, seem to be getting somewhere now
As stated in the OP I work in 64 bit Win 7. I have a win 7 32 bitpartition on the same machine I use for various things and also for testing Lightroom updates without upsetting my main LR work partition.
Earlier tonight I isntalled 4.1RC2 on my win 7 32 bit partition and ahve been working on a shoot. Interestingly the RAN usage seems much better managed. Instead of progressviely creeping up to a point of ARRGHHH!!!, with RC2 memory is released when switching images. Great news!! Now bearing mind I still need to stest this in my 64 bit martition and I will isntall RC2 once confident it wont' fall right over, but positive os far.
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http://feedback.photoshop.com/photoshop_family/topics/lr4_0_reacts_extremely_slow
who said:
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I worked with a number of you who volunteered to try an experiment a couple weeks ago that turned off something we call negative caching. The results were mixed; a couple people said it was a clear improvement, others didn't see a benefit. But I'll offer it here in case it helps others who find performance starts out reasonably then suddenly, consistently goes south until a restart.
What the following will do is turn off a cache which saves some of your most recent work done in Develop such that if you revisit a recently touched image, it loads faster. However, if our calculations are off, this cache can sometimes get too big and cause ACR to use virtual memory instead of RAM.
To try it:
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2. Launch Lightroom, go to the Preferences dialog, Presets tab, and hit “Show Lightroom Presets Folder”.
3. Close the Preferences dialog, quit Lightroom.
4. Drop the attached config.lua file into the Lightroom folder that was opened in step 2 (do not put it in one of the preset subfolders). So the path to the file will look like this:
Mac: /Users/[yourname]/Library/Application Support/Adobe/Lightroom/config.lua
Win: C:\Users\[yourname]\AppData\Roaming\Adobe\Lightroom\config.lua
You’ll know this switch to turn the cache off is working if you see the “Loading...” symbol even when you revisit the previously edited image in Develop. (When caching is on, you can often revisit a recently edited photo without the Loading warning showing.)
I'll report back laters

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Jpg painting slow

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