If you are a contractor, then yes, you don't have much choice, just do as asked. It's probably easier. If on the other hand you are a junior programmer just doing what your manager tells you, do consider raising your concerns.
Do it very carefully, a lot of managers don't like being told they are wrong. Try to phrase it as questions, and don't whatever you do criticise any existing code, some people can be very defensive about the code they write. Ultimately though, if the manager is any good you will be recognised as being more aware of the big picture.
That depends on the implementation of Log4Net. Async operations are run on a background thread. Creating new threads is an expensive operation. Ms Office 2003 Professional Keygen Idm.
The performances hit is probably there. If Log4Net is creating it's own threads, then you've found the problem. If it's already using the managed thread pool, that runs a bit quicker since the threads are already created. They're just waiting around for some code to run. Also, you've not going to get better performance than just calling the blocking method of the library. All Async operations have an overhead to setup the background worker that the equivilent blocking call doesn't have to go through. What you are doing here is potentially a bit risky.
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What happens when you call ThreadPool.QueueUserWorkItem is that the method is queued on the thread pool and the main thread continues immediately. Then, when a thread in the pool becomes free, it does the requested work. By default there are no threads in the pool, and every time work is requested one is created, up until a max (which I think is about 25 by default). What you are doing is adding 10000 requests to the pool very quickly. So 25 threads will be created. You are then left with 9975 jobs left in the thread pool queue.
These will wait until the first 25 begin to finish, then the threads will start processing them. There are three things to be aware of with this approch. 1) When your reach the objTimer.Stop(); line, your thread pool is still processing the tasks. If you killed your app at this point without letting the thread pool finish, not all the log entries would be written. 2) You cannot guarantee that the tasks will be performed in the order you added them to the thread pool.
If the order of the log entries is important, this solution is no good. (Although it's a queue, all this means is that the jobs get started in the correct order, it's possible a job could get pre-empted and switched out before it's written the log so a different log entry could get written first) 3) You should note that the logging still takes the same amount of time, just it's being done away from the main thread so you aren't timing it. This means if your main thread is adding log requests to the thread pool faster than the thread pool can process them you risk the queue getting longer and longer and longer and the thread pool not being able to keep up.
Eventually, it will get so far behind that the logs actually get processes ages after they were originally added, and potentially even fill up memory if the queue gets too large. (Also, the same amount of CPU time is taken up. If it's got multiple CPUs the work may be done on a different CPU, but if the system is already maxed out all it's CPUs from your main app, this isn't going to improve anything, all that will happen is that the main app threads will have to run slower to allow the thread pool to work) Ok. So that's the bad news. However, I have an idea that might help you.
Assuming you are happy with processing on the background thread as means for improving 'performance', you could use a producer/consumer thread queue. The idea is that you have a queue of tasks. You can add new tasks to the end of the queue.
A single thread processes tasks from the front of the queue. It has to be just 1 thread to prevent the risk of the tasks order getting swapped. (Similar to the idea of using the thread pool, but restricting it to one thread). Then, you also add a queue size restriction. When the queue reaches it's maximum size, when an attempt is made to add to it, it blocks until the queue reduces. You could set your queue restriction size to a few thousand, so your app would run, adding tasks to the queue really quickly, but if the queue ever got full, it would slow up to allow the queue to be cleared a bit.
This will only really help if your app makes a lot of log requests in a short period of time, then stops for a bit. This way the log requests won't slow it up during the busy period, and they can be processed in the background while the main app idles. Medical Physiology Boron Torrent Pdf Books. (This is fairly tricky to implement correctly, so do some research and check out existing produce/consumer queue.
There are plenty of examples on google. The tricky bit is making sure the queue is locked correctly during enqueue and dequeue operations, and that the consumer thread waits correctly when the queue is empty) [Edit: Good luck ]. Pulsar1960 9-Nov-08 8:12 9-Nov-08 8:12 Hello, I have an application that reads XML files containing coordinates of text and graphics objects (lines, arrows, etc.). The coordinates are in units equal to (font height) / 8.
In my override of Control.OnPaint(), I include a line like this to change the PageScale property of the Graphics object passed in to the function. Float font_height = Font.GetHeight(e.Graphics); e.Graphics.PageScale = font_height / 8; This works as expected in that Graphics.PageScale is set to approximately 2.8 and all of the calls to the drawing and text ends up at the coordinates read from the XML files multiplied by 2.8. The problem is in my override of OnMouseMove.
I need to change the color of these lines and text as the user passes the mouse over them. Since there is not a Graphics object passed into OnMouseMove I create one using Control.CreateGraphics().
The problem is that even though I change the PageScale property to the same value as in OnPaint, the drawing functions do not recognize the new scaling factor. In the debugger I can see that the value of PageScale has been successfully changed. Has anyone run into this problem or am I doing something wrong?