Re: Speed of big cats.
Re: Speed of big cats.
- Subject: Re: Speed of big cats.
- From: Emmanuel <email@hidden>
- Date: Thu, 4 Aug 2005 02:49:52 +0200
Title: Re: Speed of big cats.
I organized a rapid speed test a few hours ago. Here are the
results.
For us AppleScript users of "do shell script" Tiger is
5 times slower than Panther.
The graphic below is about how many times in 1,000,000,000 clock
cycles your computer will be able to run an empty "do shell
script" command (which essentially launches a shell, I
suppose.)
(The osax call overhead was subtracted, approximated by the time
"beep" (which is asynchronous I think) needs to run (a very
small fraction of the time for do shell script, anyway.))
This is supposed to flatten the differences between the machines
which associated with their different clock frequencies. In other
terms, if my 450 MHz makes exactly half the performance of your 900
Mhz we shall be the same point in the plot.
The average for Panther is 201 calls per Giga-cycle, and 40.6
calls per Giga-cycle for Tiger.
In other terms, if you have purchased a 2 GHz G5, do shell script
means 2.5 milliseconds for you until you purchase Tiger and do shell
script requires 12 milliseconds, like on your grandma's 450 GHz G4
with the 20 GB HD which is still under Jaguar.
A good cocktail (the point above 250) is a G4, 1GHz, 1GB, under
Panther.
Of course, I'll provide to whoever asks the data and the script
which makes the graph.
Emmanuel
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