Re: performance bug of [[ $x ]]

[Peng Yu]

My OS is Mac OS X. I don't have perf. Is it only on linux? Could you
show me the output of your perf?

On 3/7/20, Chris Down <chris@chrisdown.name> wrote:
> Peng Yu writes:
>>Could you show me how you do the profiling for this specific case?
>>Based on what proof that you can conclude that it is not the `[[`
>>performance problem?
>
> Like I said, `perf` is perfectly adequate.
>
>      bash -c 'x=$(printf "%.sx" {1..10000000}); perf record -g -p $$ & sleep
> 2; time [[ $x ]]'
>
> You might as well just use `:`.
>


-- 
Regards,
Peng