[fpc-devel] Re: Compiler bottlenecks

[Mattias Gärtner]

Zitat von Jonas Maebe <jonas.maebe at elis.ugent.be>:

> Michael Schnell wrote on Thu, 15 Jul 2010:
>
>> Did somebody take a look at FastMM for Delphi ? (  
>> http://sourceforge.net/projects/fastmm/ )
>>
>> Same seems to use a nice paradigm doing the Memory management for  
>> threaded applications.
>
> Then please explain that paradigm, since apparently you already looked at it.
>
> In return, I will explain the FPC heap manager's paradigm: per  
> thread, there is a separate heap manager so that in most cases no  
> synchronisation is required. Only if memory is allocated in one  
> thread and freed in another, then it will be added to a global  
> locked structure. When a thread runs out of memory in its pools, it  
> will first check this global (synchronised) structure before asking  
> for more memory from the OS.

Does that mean, if I let a worker thread create strings, pass them to  
the main thread, free the worker thread and unreference the strings in  
the main thread the global structure will grow and grow?

Mattias