Thank you, that cleared things up perfectly. I was familiar with the bit from perldata about pre-sizing large arrays for efficiency (although it describes the gain as "miniscule," which is clearly not the case here), but I assumed that meant the CPU efficiency of not requiring repeated re-allocations of memory -- the doubling you speak of. I didn't realize that those doublings were done in new memory rather than appending to what was already allocated, causing inefficiency memory-wise too. And I hadn't thought about the fact that two arrays exist at once in the first method, but it makes perfect sense.
Aaron B.
Available for small or large Perl jobs; see my home node.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|
