So, I've got a colon-delimited string, that looks like this: 
my $str="17:43:33:21:23:19:27:6";

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which is really a stringified hash, that looks like this: 
%hash=(17=>43,
       33=>21,
       23=>19,
       27=>6);

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This hash represents proportion-weights for advertisement roatation. That is, 17% of the time, ad #43 shows. 33% is ad #21, and so on. The way I am codifying this is to have an array, 0..99, where 
scalar(grep/$hash{$key}/@ary)==$key;

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So, the whole thing looks something like this: 

my $str="17:43:33:21:23:19:27:6";
my %hash=split/:/,$str;
foreach my $k(keys %hash)
{
    push (@ary, map{$hash{$k}}(1..$k));
}
my $adId=$ary[int(rand(100))];

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I've ran some timed tests on this, and am not pleased with the results. Testing has determined that the part where the array is populated (via the push/map while foreaching over keys %hash) is where much of my load is coming in.

Any thoughts on how to streamline that (or any other part of the code) to make run faster?

ÅßÅ×ÅßÅ
"It is a very mixed blessing to be brought back from the dead." -- Kurt Vonnegut

In reply to $str to %hash to @ary by abaxaba

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