R Under development (unstable) (2023-11-16 r85542 ucrt) -- "Unsuffered Consequences"
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> library("R.utils")
Loading required package: R.oo
Loading required package: R.methodsS3
R.methodsS3 v1.8.2 (2022-06-13 22:00:14 UTC) successfully loaded. See ?R.methodsS3 for help.
R.oo v1.25.0 (2022-06-12 02:20:02 UTC) successfully loaded. See ?R.oo for help.

Attaching package: 'R.oo'

The following object is masked from 'package:R.methodsS3':

    throw

The following objects are masked from 'package:methods':

    getClasses, getMethods

The following objects are masked from 'package:base':

    attach, detach, load, save

R.utils v2.12.3 successfully loaded. See ?R.utils for help.

Attaching package: 'R.utils'

The following object is masked from 'package:utils':

    timestamp

The following objects are masked from 'package:base':

    cat, commandArgs, getOption, isOpen, nullfile, parse, warnings

> 
> x <- 1:10
> str(x)
 int [1:10] 1 2 3 4 5 6 7 8 9 10
> 
> file <- tempfile(fileext="")
> 
> file1 <- saveObject(x, file=file)
> print(file1)
[1] "D:/temp/RtmpmeYdkZ/file8d74415c7e2a"
> x1 <- loadObject(file1)
> str(x1)
 int [1:10] 1 2 3 4 5 6 7 8 9 10
> stopifnot(all.equal(x1, x))
> file.remove(file1)
[1] TRUE
> 
> file2 <- saveObject(x, file=sprintf("%s.xdr", file))
> print(file2)
[1] "D:/temp/RtmpmeYdkZ/file8d74415c7e2a.xdr"
> x2 <- loadObject(file2)
> str(x2)
 int [1:10] 1 2 3 4 5 6 7 8 9 10
> stopifnot(all.equal(x2, x))
> file.remove(file2)
[1] TRUE
> 
> file3 <- saveObject(x, file=sprintf("%s.rds", file))
> print(file3)
[1] "D:/temp/RtmpmeYdkZ/file8d74415c7e2a.rds"
> x3 <- loadObject(file3, format="rds")
> str(x3)
 int [1:10] 1 2 3 4 5 6 7 8 9 10
> stopifnot(all.equal(x3, x))
> file.remove(file3)
[1] TRUE
> 
> file4 <- saveObject(x, file=sprintf("%s.Rbin", file))
> print(file4)
[1] "D:/temp/RtmpmeYdkZ/file8d74415c7e2a.Rbin"
> x4 <- loadObject(file4)
> str(x4)
 int [1:10] 1 2 3 4 5 6 7 8 9 10
> stopifnot(all.equal(x4, x))
> file.remove(file4)
[1] TRUE
> 
> if (isPackageInstalled("digest")) {
+   file <- saveObject(x)
+   print(file)
+   file.remove(file)
+ }
Loading required namespace: digest
[1] "aa8307f1596465d0ac1e6c17c32caa14.xdr"
[1] TRUE
> 
> 
> proc.time()
   user  system elapsed 
   0.34    0.09    0.42