Add `period` (sampling) information in pprof web viewer.

[bwplotka]

Thanks for the amazing project!

It would be amazing to have information about the period (so sampling) of the profiles we are analysing. I would expect it to see in pop up when clicking on the right menu item with the file name and sample type, but it's not there:

Proposal

• Add field Sampling: to the mentioned pop-up based on period and period_type. E.g. for my profile above it would be Sampling: 512 KB (space).

Question

Am I right that the only way to discover the period right now is through -raw? e.g.:

go tool pprof -raw ~/Downloads/heap | head
PeriodType: space bytes
Period: 524288
Time: 2022-07-13 21:32:01.407524692 +0200 CEST
Samples:
alloc_objects/count alloc_space/bytes inuse_objects/count inuse_space/bytes
        341     525056          0          0: 1 2 3 4 5 6 7 8 9 10 11
                bytes:[1536]
      10923     524312          0          0: 12 13 14 14 15 16 17
                bytes:[48]
       8192     524320          0          0: 18 19 20 21 22 23 24 10 11