Great, thanks Michael.
I had another idea. Is it really required to subclass TPersistent for RTTI
information or can I just use {$M+} on the units that I need and leave the
class hierarchy the same?
> On Mar 26, 2016, at 6:00 PM, fpc-pascal-requ...@lists.freepascal.org wrote:
>
> On Sat, 26 Mar 2016, Ryan Joseph wrote:
>
>> What are all the performance costs associated with subclassing TPersistent
>> for RTTI information? I want to use this in some classes but
>> unfortunately the way my code is written I need to basically make all my
>> classes descend from TPersistent, even classes that don?t need RTTI
>> information.
>
> There is none.
>
>> I noticed in my project there is an extra .6 seconds of compile time when
>> I make the changes but are there any other performance costs to consider
>> during runt time or otherwise? I could deal with .6 seconds at compile
>> even though 95% of that is waste but runtime is another story.
>
> The overhead is most likely due to writing of RTTI tables.
> They are static, and add to the size of the binary, but do not incur speed
> penalties.
>
> Michael.
Regards,
Ryan Joseph
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