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Benefits of Asynchronous Programming

There are two things which are very important for any application –
Usability and Performance. Usability because say a user clicks on a
button to save some data. This requires multiple smaller tasks like
reading and populating data in internal object, establishing connection
with SQL and saving it there etc. As SQL runs on another machine in
network and runs under different process, it could be time consuming and
may take bit longer. So, if the application runs on a single thread then
the screen will be in hanged state till all the tasks completes which is
a very bad user experience. That’s why nowadays many applications and
new frameworks completely rely on asynchronous model.

Performance of an application is also very important. It has been seen
that while executing a request, around 70-80% of the time gets wasted
while waiting for the dependent tasks. So, it can be maximum utilized by asynchronous programming where once the task is passed to another
process (say SQL), current thread saves the state and available to take
another task. When the SQL task completes any thread which is free, can
take it up further.

And as you have noticed i have implemented a portable and efficient implementation of a future in Delphi and FreePascal, i think you can
also use it for Asynchronous Programming, look at GetIsReady() method
etc. inside the source code to see how to use it for Asynchronous
Programming.

You can download my portable and efficient implementation of a future in
Delphi and FreePascal version 1.06 from:

https://sites.google.com/site/scalable68/a-portable-and-efficient-implementation-of-a-future-in-delphi-and-freepascal


Thank you,
Amine Moulay Ramdane.

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