UI freezing when CPU hits 100% constantly

UI freezing when CPU hits 100% constantly - follow up, part deux

My last post had a comment from @LordHanson about changing the thread priority via the ThreadStart parameter to see if this improved the performance.

I made the following small change to include setting the thread priority:

This improved the responsiveness of the UI when the number of thread is equal to or greater than the number of logical processors (tested with 2 * System.Environment.ProcessorCount), I still see the UI stuttering & stalling occasionally but it's greatly reduced - happens less than 10% of the time.

I then start to wonder is it better from the point of view of total time taken to reduce the concurrency to less than the number of logical processors or to reduce the thread priority. I suppose the answer depends on which technique you want to use, for me there isn't a justifiable reason not to use the Parallel.For from the TPL - it's not a piece of time critical code.

Comments

Integrating jasmine into Visual Studio 2010/2011 beta

Following on from my previous post about testing javascript with jasmine. I was interested to explore integration into visual studio 2010 so I could run them along side test written in another language like C#. I found the VS 2010 extension Chutpah (pronounced 'hutz-pah'). This got me up and running with the ability to run test manually and to my surprised it worked by only have the SpecRunner.html file open. I didn't a csproj or sln file containing the javascript, it's clever enough to resolve all dependencies: Test results are render in the output window of VS 2010: This is good and I appreciate the work someone has done to get this far but I want more... I want integration into Resharper... A quick squizz on the inter'webs and I end posting a request on jetBrains forum , it looks like support is coming in R# 7. Then I thought lets check out the current beta and see, so off I go and boot Win8 and install R#7 beta and see if it's there yet... ...

Showing a message box from a ViewModel in MVVM

I was doing a code review with a client last week for a WPF app using MVVM and they asked ' How can I show a message from the ViewModel? '. What follows is how I would (and have) solved the problem in the past. When I hear the words ' show a message... ' I instantly think you mean show a transient modal message box that requires the user input before continuing ' with something else ' - once the user has interacted with the message box it will disappear. The following solution only applies to this scenario. The first solution is the easiest but is very wrong from a separation perspective. It violates the ideas behind the Model-View-Controller pattern because it places View concerns inside the ViewModel - the ViewModel now knows about the type of the View and specifically it knows how to show a message box window: The second approach addresses this concern by introducing the idea of messaging\events between the ViewModel and the View. In the example ...

WPF tips & tricks: Dispatcher thread performance

Not blogged for an age, and I received an email last week which provoked me back to life. It was a job spec for a WPF contract where they want help sorting out the performance of their app especially around grids and tabular data. I thought I'd shared some tips & tricks I've picked up along the way, these aren't probably going to solve any issues you might be having directly, but they might point you in the right direction when trying to find and resolve performance issues with a WPF app. First off, performance is something you shouldn't try and improve without evidence, and this means having evidence proving you've improved the performance - before & after metrics for example. Without this you're basically pissing into the wind, which can be fun from a developer point of view but bad for a project :) So, what do I mean by ' Dispatcher thread performance '? The 'dispatcher thread' or the 'UI thread' is probably the most ...

Awkward Coder

Search This Blog