[PATCH] ld: pe: Improve performance of object file exclude symbol directives

[Jan Beulich]

On 06.09.2022 13:42, Nick Clifton wrote:
>> On 05.09.2022 14:54, Nick Clifton via Binutils wrote:
>>>> +      max_exclude_symbols = ROUND_UP(fdef->num_exclude_symbols + 1, 32);
>>>
>>> Given that the point of this patch is to improve performance when there
>>> are a large number of excluded symbols, incrementing the array by 32 slots
>>> at a time seems counter intuitive.  I would suggest a bigger number, eg 1024
>>> or 10240.
>>
>> Perhaps double the value, thus not overly much impacting the case of there
>> being a moderate number of excludes?
> 
> To be honest I have no idea what a "large number of excludes" might look like.
> So maybe 32 is actually a sensible increment.  Doubling the increment every
> time the limit is reached could lead to resource exhaustion issues in extreme
> cases, but I doubt if that will ever happen in real life, so that works for me
> too.

Well, first I was thinking of a hybrid approach - double until reaching 1024,
then increment further by 1024. But then this seemed to be going a little too
far, so I suggested the simpler alternative. Thoughts?

Jan