NAME
Text::Xslate::PP - Yet another Text::Xslate runtime in pure Perl
VERSION
This document describes Text::Xslate::PP version 1.0012.
DESCRIPTION
This module implements Text::Xslate runtime engine in pure Perl. Normally it will be loaded if it fails to load XS. So you do not need to use this module explicitly.
# Text::Xslate loads PP if needed
use Text::Xslate;
my $tx = Text::Xslate->new();If you want to use Text::Xslate::PP, however, you can use it.
use Text::Xslate::PP;
my $tx = Text::Xslate->new();XS/PP mode might be switched with $ENV{XSLATE} = 'pp' or 'xs'.
From 0.1024 on, there are two pure Perl engines. Text::Xslate::PP::Booster, enabled by $ENV{XSLATE} = 'pp=booster', generates optimized Perl code from intermediate code. Text::Xslate::PP::Opcode, enabled by $ENV{XSLATE} = 'pp=opcode', executes intermediate code directly, emulating the virtual machine in pure Perl.
PP::Booster is much faster than PP::Opcode, but it may be less stable. The default pure Perl engine is PP::Booster, so if you run into problems, please try $ENV{XSLATE} = 'pp=opcode'.
$ENV{XSLATE} = 'pp=verbose' } may be useful for debugging.
NOTE
Performance
There might be cases where you cannot use XS modules.
Here is a result of benchmark/x-poor-env.pl to compare pure Perl template engines in poor environment where applications runs as CGI scripts and XS modules are not available.
$ perl -Mblib benchmark/x-poor-env.pl
Perl/5.10.1 i686-linux
Xslate backend: Booster
Text::Xslate/0.1058
Template/2.22
HTML::Template/2.9
Text::MicroTemplate/0.15
Text::MicroTemplate::Extended/0.11
1..3
ok 1 - TT: Template-Toolkit
ok 2 - MT: Text::MicroTemplate
ok 3 - HT: HTML::Template
Benchmarks with 'include' (datasize=100)
Rate TT HT Xslate MT
TT 76.1/s -- -60% -61% -82%
HT 189/s 149% -- -3% -56%
Xslate 196/s 158% 4% -- -54%
MT 429/s 463% 126% 118% --According to this result, PP::Booster is over 2 times faster than Template::Toolkit, and as fast as HTML::Template, but slower than Text::MicroTemplate.
SEE ALSO
AUTHOR
Text::Xslate::PP stuff is originally written by Makamaka Hannyaharamitu <makamaka at cpan.org>, and also maintained by Fuji, Goro (gfx).
LICENSE AND COPYRIGHT
Copyright (c) 2010 by Makamaka Hannyaharamitu (makamaka).
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.