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| -rw-r--r-- | gnu/packages/perl.scm | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/gnu/packages/perl.scm b/gnu/packages/perl.scm index c98d3429ed..15138d453f 100644 --- a/gnu/packages/perl.scm +++ b/gnu/packages/perl.scm @@ -8854,6 +8854,38 @@ can also be useful as a development and debugging tool for catching updates to variables that should not be changed.") (license (package-license perl)))) +(define-public perl-readonly-xs + (package + (name "perl-readonly-xs") + (version "1.05") + (source (origin + (method url-fetch) + (uri (string-append + "mirror://cpan/authors/id/R/RO/ROODE/Readonly-XS-" version + ".tar.gz")) + (sha256 + (base32 + "03gz7yp194fwah2bc36ww04hgw1qx8p6y68vvnywircrablc9rca")))) + (build-system perl-build-system) + (propagated-inputs (list perl-readonly)) + (home-page "https://metacpan.org/release/Readonly-XS") + (synopsis "Companion module for @code{Readonly.pm}, to speed up read-only +scalar variables") + (description + "The @code{Readonly} module 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 @code{Readonly::XS} is installed, @code{Readonly} uses it to +access the internals of scalar variables. Instead of creating a scalar variable +object and tying it, @code{Readonly} simply flips the @code{SvREADONLY} bit in +the scalar's @code{FLAGS} structure.") + (license license:perl-license))) + (define-public perl-ref-util-xs (package (name "perl-ref-util-xs") |