| Subject: | Mail::Box uses a lot of memory to list a Maildir |
This is probably a general problem with Mail::Box but I've only tried
this with a Maildir.
When I run a simple program to list a Maildir (attached) which just
iterates over $folder->messages and calls some methods on the $message
object memory use seems to grow as Mail::Box processes more messages.
There's probably a memory leak somewhere in the module that's causing
this.
E.g. on a Maildir with 35k messages it consumed around 800MB of RES
memory on Linux, and on a smaller Maildir with ~15k messages it consumed
around 200MB.
I've attached a small lsmail.pl which is the troublesome program. It
takes a path to a Maildir. lsmail.sh is a small wrapper I use to list
all the maildirs in ~/Maildir
I've been using this on a Maildir synced with offlineimap from GMail.
| Subject: | lsmail.pl |
#!/usr/bin/env perl
use 5.012;
use Mail::Box::Manager;
use Format::Human::Bytes;
my $mailbox = shift || die "no mailbox";
my $mgr = Mail::Box::Manager->new;
my @open_options = (
access => 'r',
extract => 'LAZY'
);
my $folder = $mgr->open(folder => $mailbox, @open_options);
my $total_size = 0;
my $total_messages = 0;
$mailbox =~ s[/home/avar][~];
for my $message ($folder->messages) {
my $subject = $message->head->get('subject') || '';
my $from = $message->head->get('from') || '';
my $to = $message->head->get('to') || '';
my $list = $message->head->get('list-id') || '';
my $size = $message->size;
my $size_human = Format::Human::Bytes::base2($size);
printf "%10d\t%s\tsubject:<%s>\tfrom:<%s>\tto:<%s>\tlist:<%s>\tmailbox:<%s>\n", $size, $size_human, $subject, $from, $to, $list, $mailbox;
# totals
$total_size += $size;
$total_messages += 1;
}
printf "%10d\t%s\tmessages:<%d>\taverage message size:<%s>\tmailbox:<%s>\n",
$total_size,
Format::Human::Bytes::base2($total_size),
$total_messages,
Format::Human::Bytes::base2($total_size / ($total_messages||1)),
$mailbox;
| Subject: | lsmail.sh |
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