Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things
 
PerlMonks  

Re: Re: my $var; vs. use constant VAR = '';

by MeowChow (Vicar)
on Apr 27, 2001 at 01:12 UTC ( #75917=note: print w/ replies, xml ) Need Help??


in reply to Re: my $var; vs. use constant VAR = '';
in thread my $var = ''; vs. use constant VAR => '';

Actually constants are faster, since use constant simply turns them into constant subs (for versions of Perl that support this):

sub CONST_NAME () { 'value' }
IIRC, this form is optimized by the Perl compiler such that there are no hits to the symbol table in dereferencing the value; it would be as if you typed the constant value in as a literal, much like a preprocessor #DEFINE macro.

update: Looks like I was wrong, my variables are actually a hair faster than both constants and even literal values.

   MeowChow                                   
               s aamecha.s a..a\u$&owag.print


Comment on Re: Re: my $var; vs. use constant VAR = '';
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://75917]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others meditating upon the Monastery: (12)
As of 2015-07-07 15:36 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (90 votes), past polls