Hi there,
I'm having a problem with template toolkit Version 2.14, which appears
to have a memory leak when using custom filters.
I'm running an Apache webserver (1.3.29) with mod perl (1.29). When
running my webserver in single-user mode with the -X flag, and using 'ps
u -u httpd' to measure memory usage, the memory usage of my webserver
process increases by an amount proportional to the size of the template
file every time I process a template which the '[% USE my_filter %]
directive. (I have code snippets further down if they would be
helpful).
The TODO file on tt2.org contains the following:
"The 'eval' filter leaks memory, as reported by Colin Johnson. The
filter subroutine created contains a reference to the context and then
gets cached in the FILTER_CACHE item of the context. Hey presto -
circular references. The reset() method should probably clear the
FILTER_CACHE..."
"...Also need to check the plugins cache for similar problems."
Am I running into the same problem, expressed through the plugins cache?
Does anyone have any suggestions or information on fixing or working
around this? I couldn't find anything related to a reset() method - Is
this a suggested workaround, or a musing about a future fix?
If it is helpful, here is the code I'm using to process the templates:
test.cgi:
-----------------------
my $t = Template->new({
INCLUDE_PATH => "Templates",
PLUGIN_BASE => "Eznettools::Filter::Template",
});
$t->process( 'test.ttml', {} ) ||
say("Template processing failed: ".$t->error(), 1);
-----------------------
test.ttml:
-----------------------
[%- USE JScriptSafe -%]
Template Processed!
-----------------------
(Note that I do not use the filter in this template, just including
the filter causes the leak)
JScriptSafe.pm: (I've removed most of the comments to keep the
size of this email down)
-----------------------
package Eznettools::Filter::Template::JScriptSafe;
use strict;
use Eznettools::Filter::HTML qw(make_jscript_safe);
use base qw( Template::Plugin::Filter );
sub init {
my $self = shift;
# (Commented out to see if helped the memory leaks...it doesn't.)
#
# my $name = $self->{ _ARGS }->[0] || 'ezjscript';
# $self->install_filter( $name );
return $self;
}
sub filter {
my ($self, $text) = @_;
return make_jscript_safe( $text );
}
-----------------------
I'd appreciate any suggestions/advice anyone could give. I searched the
mailing list archives back to the release of TT 2.14 and didn't find
anything that looked related to this problem, sorry if it's already been
addressed.
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