Hello!

Would you tell me, please, what technics of multi-thread usage can icrease CPU's calculation speed?

Thank you!

First off, threads don't increase CPU calculation speed.

They do allow multi-tasking and exploiting CPU idle time and the use of multiple cores and. multiple CPUs.

For example (single core single cpu):
Say you have a page that requires 4 database calls. Each call takes 50ms for the database to respond.
In a single threaded environment, the server will spend 200ms, just waiting on the database.
If you executed each query in it's own thread, the server will only spend 50ms waiting on the database.

make sense?

And there are many other cases, in which multi-threading can endecrease general time for algorithm execution. For example mathematical calculations.

(A+B)*(C+D).
.(A+B) and (C+D) calculations can be executed simultaneously, because A,B and C,D variables are not dependent on execution step. But for “*” operation we should wait for execution of these 2 threads: .(A+B) and (C+D) – operands are dependent from previous step of execution

Is there any automated tools or techniques to find potential able for multi-threading parts in general algorithm (to find ability to execute simultaneously (A+B) and (C+D) in the example)? If no it is wonderful to develop one, program, which makes multi - threadable algorithm from single threaded one.

Look into the actor model paradigm. Microsoft recently released Axum, which will work with the .NET framework.

Other languages have support for multiple threads, but actor model languages were developed with parallel computing in mind.

Threading does not increase the CPU speed. It just uses the CPU ideal time for any valuable processing. Multithreaded programming makes programs running faster when dealing with multicore processors or multiple processor computer systems.

Support, you have one application and that has 3 features.

- uploading image it to the server
- Inserting the record of this screen shot in the database
- Printing the taken screen shot

You can use 3 different threads for executing these three function and execute them simultaneously to increase the task completion speed.

If you are developing applications on .NET platform, then there is a System.Threading namespace that has the wide range of built-in classes to deal with threads, process contexts, dealing with critical region of processes etc.

Thanks!