in reply to perl hashes
Your performance is determined by the type of operations you're performing. If you are not scanning keys (ie, my @keys = keys(%bigHash); such that you are always looking up values with a previously known key (ie, my $value = $bigHash{$key};), then a hash maintains its performance quite well even when it is very large and, as stated early, memory/resource usage is your greatest concern.
That said, Benchmark can help you determine the performance of the hash at different sizes.
That said, Benchmark can help you determine the performance of the hash at different sizes.
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