fprof tree walk time output option for seconds in fprof.py

[weloewe]

For cases where comparing expected time from a tree walk scan would be convenient to have in seconds, would it be possible to include the following option with a flag?

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>     parser.add_argument("--showseconds", action="store_true",
>                         help="Display elapsed time in seconds")
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<             print(fmt_msg2.format("Tree walk time:",
<                                   utils.conv_time(elapsed_time)))
---
>             if args.showseconds:
>                 print(fmt_msg2.format("Tree walk time (s):",
>                                       elapsed_time))
>             else:
>                 print(fmt_msg2.format("Tree walk time:",
>                                       utils.conv_time(elapsed_time)))