No, this violates the no-copy rule. If $a is
a 10Mb string instead of 'a', then, during
the assignement ($a,$b)=($b,$a) the process
allocates 10 more Mb. I have verified the following
resident memory counts:
print "stage 0\n";
sleep 5; # memory usage now: 1800 Kb
$a='a' x 10000000;
$b='b';
print "stage 1\n";
sleep 5; # memory usage now: 21336 Kb
($a,$b)=($b,$a);
print "stage 2\n";
sleep 5; # memory usage now: 31104 Kb
-
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.
|