read file on Mac much slower as on Win!?
Tiemo Hollmann TB
toolbook at kestner.de
Sun Jan 18 07:51:28 CST 2009
I made a repeat loop with read/write file to copy large zip files and be
able to show a progress (instead of using the shell). It works fine, beside
of a relevant speed difference between Win Notebook 1,8 Ghz Core 2 Duo, 2GB
and Mac Book 2,2 Ghz, Core 2 Duo, 2GB.
For example reading/writing a 1,3 GB zipfile takes on the Win machine about
7 min, on Mac, first test 72 min, second test 20 min. Actually I have to
copy 6 times 1,3 GB. So it is pretty relevant, if it takes 7 or 70 min
(don't know why it took once 70 min and once 20 min). This would be in worst
case a total installation time of 7 hours!
Could it be that I have to use a different chunk size on Mac, as on Win,
because of different memory or file management? Smaller? Bigger?
The script snippet looks like:
open file tQuellFile for binary read
open file tZielFile for binary write
repeat until it is empty
read from file tQuellFile for 10000
write it to file tZielFile
Thanks for any ideas, how to increase the speed.
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