NAME
Text::Xslate::PP - Yet another Text::Xslate runtime in pure Perl
VERSION
This document describes Text::Xslate::PP version 0.1057.
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::Xlsate::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 is less stable, so the default pure Perl engine is PP::Opcode, but PP::Booster will become the default in a future if it is stable enough.
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
Text::Xslate/0.1055
Template/2.22
HTML::Template/2.9
Text::MicroTemplate/0.13
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 Xslate HT MT
TT 82.4/s -- -37% -64% -87%
Xslate 130/s 58% -- -43% -80%
HT 230/s 179% 77% -- -65%
MT 654/s 695% 404% 185% --Yes, this is slow, but somewhat faster than Template-Toolkit.
Moreover, there is another pure Perl engine: PP::Booster, which is faster than PP::Opcode.
$ perl -Mblib benchmark/x-poor-env.pl --booster
(snip)
Benchmarks with 'include' (datasize=100)
Rate TT HT Xslate MT
TT 83.0/s -- -63% -67% -87%
HT 223/s 169% -- -10% -64%
Xslate 249/s 200% 12% -- -60%
MT 627/s 655% 181% 152% --According to this result, PP::Booster is 2 times faster than PP::Opcode, as fast as HTML::Template, and 3 times faster than Template-Toolkit.
SEE ALSO
AUTHOR
Makamaka Hannyaharamitu <makamaka at cpan.org>
Text::Xslate was written 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.