search for: localreferenceclasses

...A new kind of class, "local reference classes" has been added to r-devel (rev. 61562). It's the idea that using these classes to represent data can avoid copying that's not needed, while retaining the standard R functional semantics, or close to that. For a quick look, see ?LocalReferenceClasses. Here is the idea. We imagine that our object has components/slots/attributes/fields "BigData", say, and "twiddle". With normal R evaluation, replacing "twiddle" in the object will cause internal duplication of the whole thing, in the very likely case that we pas...

...rted. There is support for larger files, up to the ustar limit of 8GB. o Local reference classes have been added to package methods. These are a technique for avoiding unneeded copying of large components of objects while retaining standard R functional behavior. See ?LocalReferenceClasses. o untar() has a new argument restore_times which if false (not the default) discards the times in the tarball. This is useful if they are incorrect (some tarballs submitted to CRAN have times in a local timezone or many years in the past even though the standard requi...

...rted. There is support for larger files, up to the ustar limit of 8GB. o Local reference classes have been added to package methods. These are a technique for avoiding unneeded copying of large components of objects while retaining standard R functional behavior. See ?LocalReferenceClasses. o untar() has a new argument restore_times which if false (not the default) discards the times in the tarball. This is useful if they are incorrect (some tarballs submitted to CRAN have times in a local timezone or many years in the past even though the standard requi...