Many of the CGI applications I have worked on spend a *lot* of time on print statements. On my machine, this code: 
my $out='';
for (0..1000)
{
  $out .= "$_"." bottles of beer on the wall\n";
}
print $out;

[download]
is about six times faster than: 
for (0..1000)
{
  print "$_"," bottles of beer on the wall\n";
}

[download]
Changing all the code to look this way is probably too much trouble. So here's an idea that is only three times faster than print: 
package Print;
require Exporter;
@ISA = qw(Exporter);
@EXPORT_OK = qw(Print);

our $sout='';

sub Print
{
  $sout .= "@_";
}

END
{
  print $sout;
}
1;

[download]
Then change your code to call Print instead of print. This is a small change that can be applied in a batch fashion to all of your slow code to speed it up. 
use Print qw (Print);
for (0..1000)
{
  Print "$_"," bottles of beer on the wall\n";
}

[download]
This hasn't been through a lot of testing, I just wrote it.

It is good practice to create some output for the user to look at early in your program, then buffer up the rest of the output that is slow to generate.

It should work perfectly the first time! - toma

In reply to Re: Speeding up commercial Web applications by toma
in thread Speeding up commercial Web applications by PotPieMan

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • 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! —
  • 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:
    & &amp;
    < &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.