Re: [PATCH] perf/test: Speed up test case perf annotate basic tests

[James Clark]

On 17/09/2024 09:57, Thomas Richter wrote:
> perf test 70 takes a long time. One culprit is the output of command
> perf annotate. Per default enabled are
>   - demangle symbol names
>   - interleave source code with assembly code.
> Disable demangle of symbols and abort the annotation
> after the first 250 lines.
>
> This speeds up the test case considerable, for example
> on s390:
>
> Output before:
>   # time  perf test 70
>   70: perf annotate basic tests             : Ok
>   .....
>   real   2m7.467s
>   user   1m26.869s
>   sys    0m34.086s
>   #
>
>   Output after:
>   # time perf test 70
>   70: perf annotate basic tests             : Ok
>
>   real   0m3.341s
>   user   0m1.606s
>   sys    0m0.362s
>   #

Interesting that there is such a big difference, I only measured 4s vs 
14s without the patch.

Either way it's slightly faster now:

Reviewed-by: James Clark <james.clark@xxxxxxxxxx>