[Lazarus] Threads in Lazarus code base

Michael Van Canneyt michael at freepascal.org
Wed Sep 15 12:46:10 CEST 2010

On Wed, 15 Sep 2010, Michael Schnell wrote:

> On 09/15/2010 10:48 AM, Michael Van Canneyt wrote:
>> Threads are a thing of the past as well. I've been programming threads 
>> since years.
>> There is nothing exciting about them, mostly they are a pain.
> OK, but
> how do you make a program that is able to non sluggishly communicate with the 
> user while performing decent work (without doing performance-killing polling 
> stuff like "process Messages") ?

What is so performance killing about process messages ?

What do you think the OS does when switching threads ? 
A thread switch is much more expensive than a "process messages".

> how do you make a program doing huge calculations use multiple CPUs which are 
> the contrary of "of the past" ?

I didn't claim to have a better solution. 
I just observed that the very idea of threads is basically flawed.

These are not my words, but the conclusion of scientific research on the subject.


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