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Text-Xslate-0.1058
River stage two • 70 direct dependents • 83 total dependents
69 ++
/ Text::Xslate::PP

NAME

Text::Xslate::PP - Yet another Text::Xslate runtime in pure Perl

VERSION

This document describes Text::Xslate::PP version 0.1058.

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

Text::Xslate

Text::Xslate::PP::Opcode

Text::Xslate::PP::Booster

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.