Re: bash optimization away question

[#!microsuxx]

with exec i meant no code do at all , not the exec binary files exec ..

On Sun, Nov 3, 2024, 13:40 #!microsuxx <fxmbsw7@gmail.com> wrote:

> dunno atm what else to optimize
>
> i had , in my thoughts , the case
> a var has much content
> and then code says var=$var or ${var<opts>}
>
> i was hoping bash wouldnt re-set long data , .. cpu : faster less load
>
> i havent benchmarked , yet
>
> On Sun, Nov 3, 2024, 09:16 Andreas Kähäri <andreas.kahari@abc.se> wrote:
>
>> On Sun, Nov 03, 2024 at 01:29:02AM +0100, #!microsuxx wrote:
>> > is a
>> >
>> > var=${var:-blabla}
>> >
>> > optimized away to no exec at all
>> > if var is not empty
>> > ?
>> >
>> > also same for = := -
>>
>> There is already no exec involved in the expansion of the parameter.
>>
>> What do you expect to gain from optimizing this away, compared to
>> optimizing something else?  Compared to actually executing an external
>> command, the time spent on this is negligible.
>>
>> --
>> Andreas (Kusalananda) Kähäri
>> Uppsala, Sweden
>>
>> .
>>
>