R Under development (unstable) (2025-05-01 r88184 ucrt) -- "Unsuffered Consequences"
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> truth <- capabilities("profmem")
> print(truth)
profmem 
   TRUE 
> 
> cache <- profmem:::capableOfProfmem()
> print(cache)
profmem 
   TRUE 
> stopifnot(identical(cache, truth))
> 
> cache <- profmem:::capableOfProfmem()
> print(cache)
profmem 
   TRUE 
> stopifnot(identical(cache, truth))
> 
> ## Fake calling profmem() when memory profiling is disabled
> ## and assert that profmem() throws an error
> f <- profmem:::capableOfProfmem
> environment(f)$res <- FALSE
> t <- profmem:::capableOfProfmem()
> print(t)
[1] FALSE
> stopifnot(identical(t, FALSE))
> res <- tryCatch({
+   p <- profmem::profmem(x <- 1:1000)
+ }, error = identity)
> stopifnot(inherits(res, "simpleError"))
> environment(f)$res <- cache  ## Undo
> 
> 
> 
> 
> proc.time()
   user  system elapsed 
   0.12    0.01    0.14