Re: it takes 1-2 seconds to return a string from a subrountine

I've just set this up on my laptop (Celeron 1.3Ghz, 128M ram), and I've got to take the string up to 32 Meg before I start seeing any appreciable effect.

Using the simple expedient of print time, "\n"; for the timer statements, it does confirm that the return is usually starting and finishing within the same second (there's the occasional second discrepancy).

Possible suggestions:

The string is far bigger than you expect
You're running out of memory
Your timing code is off
You're counting the returns across the lifetime of the process, and it's happening more than once
You could use references instead (which avoids having to clone the string), although this sidesteps the question of why it's misbehaving

--
Tommy
Too stupid to live.
Too stubborn to die.

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Re: Re: it takes 1-2 seconds to return a string from a subrountine by yangtse (Acolyte) on Aug 14, 2002 at 17:43 UTC
The problem is because I have two heavy processes for loading storable data inside the subrountine. After I moved those two out from the subrountine. The problem brothered me is gone. I guess that it is related to system memory swrap and memory allocation . I am sorry for not providing enough information earlier. Thanks a lot! `use Storable( retrieve, store) my $string = getString($ARGV[]); ENDING MY TIMER sub getString{ my ($file1, $file2) = @_; my @thisarray = @{retrieve($file1)}; # size ~ 20M my %thishash = %{retrieve($file2)}; # size ~ 5M my $thisString; # here I am doing something # to create a $thisString and its size is less than 100K STARTING MY TIMER return $thisString; }` [download]	[reply] [d/l]
Re: Re: Re: it takes 1-2 seconds to return a string from a subrountine by runrig (Abbot) on Aug 14, 2002 at 18:03 UTC
You may save alot of memory (and perhaps time) if you can avoid dereferencing the large array and hash refs. Don't dereference and assign them to the array and hash; just leave them as references.	[reply]