Even though looking up an element of a hash tends to be an O(1) operation, its algorithmic complexity only describes the scaling factor of the algorithm as n increases. If you rearranged the if/else branches in decreasing order of probability according to your expected corpus, it would be faster than the hash lookup until you reached (wild guess) a dozen or so entries in the hash, or if your working corpus deviated significantly from your expected corpus.
A good benchmark with working example data would reveal more, but remember that:
- This depends on your version of Perl, your workload, and your machine.
- Getting the best performance possible is a matter of tuning.
- Perl is sensitive to fluctuations between different optrees and working sets.
- This is unlikely a bottleneck in any meaningful application.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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! —
Posts may use any of the Perl Monks Approved HTML tags:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||