Re: How many threads is too many?

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Just something to keep in mind. For the near future computing speed is going to be gotten by going to multi-core computers. We will be seeing 4 computers on on chip soon and who knows how many more that will go up too. Single thread applications will not take advantage of this technology. So your application 2 would not take advantage of the new technologies coming to your desktop soon. Of course this doesn't mean hundreds of threads is a good thing.

Just something to think about :)
Leon Lambert

Alexander Walker wrote:
Hello

Is it inefficient to create an application that has many threads that individually may do a small amount of work over a given period of time as opposed to an application that has a smaller number of threads that do a larger amount of work over a given time period

here is an oversimplified example

application 1 has 4 threads
every second each thread makes an http request for a file on a different server and then saves the file it requested to disk

application 2 has 1 thread
every second the thread makes four http requests for a file to four different servers one after the other after each request it saves the file to disk

you could say that application 1 and application 2 do the same thing, but they do it in different ways

how expensive is it to switch between threads?

image application 1 and 2 where doing something other than requesting files, such as reading or writing from a database or executing some operations on data

I ask this because I have a windows service that creates 4 threads, the number of threads it creates is variable so in the future it might create more threads or less threads, each thread performs an operation every second, should I be concerned about how many threads I'm creating? I think that I should, but I'm not sure how to determine how many threads is too many

thanks

Alex


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