Your SQLite benchmark is seriously flawed. You really, really should prepare() your INSERT statement and wrap everything into a single transaction. And please, don't use "synchronous=OFF".

#!/usr/bin/perl

use strict;
use warnings;

use Benchmark ':hireswallclock';
use DB_File ();
use DBI ();

my $DB_FILE;
my $DBH_SQLITE;

my @CHARS       = ( 'A' .. 'Z', 'a' .. 'z', 0 .. 9, qw( ! @ $ % ^ & * 
+) );
my $NUM_RECORDS = 50_000;

setup_dbfile();
setup_sqlite();

Benchmark::cmpthese(
    10,
    {
        'berkeley' => \&benchmark_dbfile,
        'sqlite'   => \&benchmark_sqlite
    }
);

untie %$DB_FILE;


sub benchmark_dbfile {

    my $value = 0;

    while ( $value < $NUM_RECORDS ) {

        my $key = join( '', @CHARS[ map { rand @CHARS } ( 1 .. 5 ) ] )
+;

        if ( exists $DB_FILE->{$key} ) {
            $DB_FILE->{$key} .= ",$value";
        }
        else {
            $DB_FILE->{$key} = $value;
        }

        $value++;

    }

    return;

}

sub benchmark_sqlite {

    my $sth = $DBH_SQLITE->prepare( 'INSERT INTO benchmark ( key, valu
+e ) VALUES ( ?, ? )' );

    $DBH_SQLITE->begin_work;

    my $value = 0;

    while ( $value < $NUM_RECORDS ) {
        my $key = join( '', @CHARS[ map { rand @CHARS } ( 1 .. 5 ) ] )
+;
        $sth->execute( $key, $value );
        $value++;
    }

    $DBH_SQLITE->commit;

    return;

}


sub setup_sqlite {

    $DBH_SQLITE = DBI->connect(
        'dbi:SQLite:dbname=benchmark.sqlite',
        '',
        '',
        {
            'RaiseError' => 1
        }
    );

    if ( ! $DBH_SQLITE->tables( undef, undef, 'benchmark', 'TABLE' ) )
+ {
        $DBH_SQLITE->do( 'CREATE TABLE benchmark ( key VARCHAR, value 
+INTEGER )' ); 
    }

    return;

}

sub setup_dbfile {

    my %data;
    tie %data, 'DB_File', 'berkeley.db' or die "$!";
    $DB_FILE = \%data;

    return;

}

[download]

Results:

         s/iter berkeley   sqlite
berkeley   4.59       --     -81%
sqlite    0.877     423%       --

[download]

This is not surprising, because DB_File has to perform an extra "SELECT" for every "INSERT".

In reply to Re^2: fast simple DB (sqlite?) skeleton? by WizardOfUz
in thread fast simple DB (sqlite?) skeleton? by iaw4

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.