[fpc-devel] don't you think it'stime toupdatedelphimodecompatibility? - IDispatch, implements

Peter Vreman peter at freepascal.org
Sun May 29 14:16:56 CEST 2005

At 14:03 29-5-2005, you wrote:
>Jonas Maebe wrote:
>>On 29 May 2005, at 13:41, Peter Vreman wrote:
>>>>>Doesn't the compiler attempt to inline small functions/methods
>>>>>automatically as part of its optimisation (even if the inline
>>>>>directive is not specified)?
>>>The inline directive is only a hint to the compiler. The behaviour  is 
>>>the same in D2005.
>>Yes, but the poster was asking whether the compiler never decided by
>>itself to inline something (even if no "inline" directive was
>>specified). That's not the case currently.
>well thats soemthing you should add to your to do list. Automatic inlining 
>can deliver a signifcant performance improvement especially as delphi uses 
>a lot of one line procedures to set property values. A fucntion call adds 
>quite a bit of overhead (around 10+ clock cycles at a guess)

But inlining doesn't help if the one line procedures are virtual methods. 
So this automatic inlining is a low priority issue.

Note that real world applications also don't benefit from optimizations. 
Therefor effort in creating optimizations can currently better be invested 
in better maintainability and extendability of the compiler and adding new 


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