chore(bench): capturing wallclock timelines with fgtrace

[xcoulon]

see github.com/felixge/fgtrace

[codecov[bot]]

Codecov Report

Merging #1086 (13b5e01) into master (8b3c889) will not change coverage. The diff coverage is 0.00%.

:exclamation: Current head 13b5e01 differs from pull request most recent head 8926b12. Consider uploading reports for the commit 8926b12 to get more accurate results

@@           Coverage Diff           @@
##           master    #1086   +/-   ##
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  Coverage   80.76%   80.76%           
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  Files          90       90           
  Lines        7591     7591           
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  Hits         6131     6131           
  Misses        964      964           
  Partials      496      496