in reply to How to test caching?

Time it. Call the sub twice with the same parameter and time how long it takes both times. If the second is quicker than the first, it used the cache.

If it's slower, abandon caching.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In Section Seekers of Perl Wisdom