From: Zhoran Tvalve <ztuaev@...>
Date: 2010-02-18T22:57:48+09:00
Subject: ruby-prof on windows: strange measured time numbers

Hi there,
I play with ruby-prof. Profiling those simple-few-dozens-line scripts
seems clear, but when I try to profile `rake --tasks`, as follows

C:\InstantRails\rails_apps\projectN>"ruby-prof" "--printer=graph_html"
"--file=ruby_prof.rake.html" "--min_percent=1.00" "--"
"C:\InstantRails\ruby\bin\rake" --tasks

I get reported execution total time from 84 to 102 seconds, while it
actually took not more than 25 seconds.

I set environment wariable RUBY_PROF_CPU_FREQUENCY to various values
scaling them 10 times, but it seemes had no influence on execution total
time. Also I tried same with --mode key values cpu, wall.

How can I get more realistic totals?

win xp sp3, core2duo T2300 @1.66GHz
ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32]
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