The lack of an SSCCE is unfortunate. Without one, we are forced to guess, and I have little confidence in my guesses, based on past experience:

• Re^4: Fastest way to lookup a point in a set : Surprising use case where BrowserUk found Perl hashes to be way faster than an SQLite memory-based database.
• Re^2: More Betterer Game of Life : Running time reduced from 1635 seconds to 17 seconds. Tweaking the code, via a long series of micro-optimizations, reduced running time from 1635 secs to 450 secs (3.6 times faster) ... while finding a better algorithm reduced from 450 secs to 17 secs (26.5 times faster).
• The 10**21 Problem (Part I) : Running time reduced from 50 million years to one year. Many surprises along the way in this long four-part series.

From these experiences, I learnt the importance of don't assume measure and especially find a better algorithm.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.