Benefits of Asynchronous Programming

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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.