Source: libreadonly-xs-perl Maintainer: Debian Perl Group Uploaders: Damyan Ivanov Section: perl Priority: optional Build-Depends: debhelper (>= 9.20120312~), perl Standards-Version: 3.9.5 Vcs-Browser: http://anonscm.debian.org/gitweb/?p=pkg-perl/packages/libreadonly-xs-perl.git Vcs-Git: git://anonscm.debian.org/pkg-perl/packages/libreadonly-xs-perl.git Homepage: https://metacpan.org/release/Readonly-XS/ Package: libreadonly-xs-perl Architecture: any Depends: ${perl:Depends}, ${shlibs:Depends}, ${misc:Depends} Recommends: libreadonly-perl Description: faster Readonly implementation The Readonly module (q.v.) is an effective way to create non-modifiable variables. However, it's relatively slow. . The reason it's slow is that is implements the read-only-ness of variables via tied objects. This mechanism is inherently slow. Perl simply has to do a lot of work under the hood to make tied variables work. . This module corrects the speed problem, at least with respect to scalar variables. When Readonly::XS is installed, Readonly uses it to access the internals of scalar variables. Instead of creating a scalar variable object and tying it, Readonly simply flips the SvREADONLY bit in the scalar's FLAGS structure.