I'm experimenting on using CHI as the backend of a Data::Throttler-like module. The speed is not great: my module is becoming linearly slower as the max_items parameter is increased: it's about 3 times slower than Data::Throttler with max_items=100, and 20 times slower with max_items=1000. Any idea on how to close the gap, or is my endeavor with CHI in this case a lost cause? 

package Data::Throttler_CHI;

use strict;
use warnings;

sub new {
    my ($package, %args) = @_;
    bless \%args, $package;
}

my $counter = 0;
sub try_push {
    my $self = shift;
    my $now = time();
    $counter++;
    $counter = 0 if $counter == 2e31; # wraparound 32bit int
    $self->{cache}->set("$now|$counter", 1, $self->{interval}); # Y228
+6!
    my @keys0 = $self->{cache}->get_keys;

    my @keys;
    for my $key (@keys0) {
        my ($key_time, $key_serial) = split /\|/, $key, 2;
        if ($key_time >= $now - $self->{interval}) {
            push @keys, $key;
        }
    }

    # these drivers return expired keys: Memory. so we need to purge t
+hese keys
    my $do_purge = rand() < 0.05; # probabilistic
    $self->{cache}->purge if $do_purge && @keys < @keys0;

    return @keys <= $self->{max_items} ? 1:0;
}

1;

[download]

More complete code with documentation and tests is on CPAN: Data::Throttler_CHI.

In reply to Optimizing a CHI-based data throttler by perlancar

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.