R Under development (unstable) (2025-05-01 r88184 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library("R.cache")
R.cache v0.17.0 successfully loaded. See ?R.cache for help.
> oopts <- options("R.cache.compress")
> 
> simulate <- function(mean, sd) {
+   # 1. Try to load cached data, if already generated
+   key <- list(mean, sd)
+   data <- loadCache(key)
+   if (!is.null(data)) {
+     cat("Loaded cached data\n")
+     return(data)
+   }
+ 
+   # 2. If not available, generate it.
+   cat("Generating data from scratch...")
+   data <- rnorm(1000, mean=mean, sd=sd)
+   Sys.sleep(1)             # Emulate slow algorithm
+   cat("ok\n")
+   saveCache(data, key=key, comment="simulate()")
+ 
+   data
+ }
> 
> 
> for (compress in c(FALSE, TRUE)) {
+   options("R.cache.compress"=compress)
+ 
+   data <- simulate(2.3, 3.0)
+   data <- simulate(2.3, 3.5)
+   data <- simulate(2.3, 3.0) # Will load cached data
+ 
+   # Clean up
+   file.remove(findCache(key=list(2.3,3.0)))
+   file.remove(findCache(key=list(2.3,3.5)))
+ }
Generating data from scratch...ok
Generating data from scratch...ok
Loaded cached data
Generating data from scratch...ok
Generating data from scratch...ok
Loaded cached data
> 
> 
> ## Exceptions
> res <- try(findCache(key = NULL))
Error in generateCache.default(key = key, ...) : 
  Argument 'key' must be a list, an environment: NULL
> stopifnot(inherits(res, "try-error"))
> 
> ## Cleanup
> options(oopts)
> 
> proc.time()
   user  system elapsed 
   0.23    0.06    4.59