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Re: Which is quicker - writing to a file or inserting into a db?

by naChoZ (Curate)
on Dec 14, 2007 at 03:37 UTC ( #656977=note: print w/replies, xml ) Need Help??

in reply to Which is quicker - writing to a file or inserting into a db?

I recently did a poor man's benchmark just for kicks. The results might at least be interesting to you.

I wrote this little script to populate a db with 50,000 rows into a db table of three columns (one just an autoinc id).

#!/usr/bin/perl use strict; use warnings; use Data::Dumper; $Data::Dumper::Indent = 3; use Digest::MD5 qw/md5_base64/; use base qw/DBIx::Class::Schema::Loader/; DBIx::Class::Schema::Loader->loader_options( relationships => 1 ); my $schema = DBIx::Class::Schema::Loader->connect('dbi:SQLite:/tmp/tes +t'); #my $schema = DBIx::Class::Schema::Loader->connect('dbi:Pg:dbname=test +', 'postgres', '' ); #my $schema = DBIx::Class::Schema::Loader->connect('dbi:mysql:dbname=t +est', 'mysql', '' ); my @inserts; for ( 1 .. 50000 ) { push @inserts, { foo => md5_base64( $_ . 'foo' ), bar => md5_base64( $_ . 'bar' ) }; } my $new_row = $schema->resultset('TestTable'); $new_row->populate( \@inserts );

Loading to postgresql-server-8.1.9-2.1 took just under 8 minutes, mysql-5.0.26-12 about 35 seconds, sqlite-3.3.8-14 even with synchronous mode turned off couldn't even seem to handle 1000 rows a minute (I didn't wait for it to finish all 50,000 rows). I reused this script just now for writing 50,000 lines to a flat text file and it was done almost before I pressed enter.

Obviously YMMV. My workstation is a sun ultra 40 dual opteron with a pair of sata drives that I striped into a raid 0 and I'm running opensuse 10.2.


Therapy is expensive. Popping bubble wrap is cheap. You choose.

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