cache_remember()

Remember a value (get from cache or compute and store)

Attempts to retrieve a cached value by name. If the cache doesn't exist, is expired, or a refresh is requested, evaluates the expression and caches the result. This is the primary caching interface for expensive computations.

Usage

cache_remember(
  name,
  expr,
  file = NULL,
  expire_after = NULL,
  refresh = FALSE,
  expire = NULL
)

Arguments

Name	Description
name	The cache name (non-empty string identifier)
expr	The expression to evaluate and cache if cache miss occurs. Expression is evaluated in the parent frame.
file	Optional file path to store the cache (default: `cache/{name}.rds`)
expire_after	Optional expiration time in hours (default: from config). Character durations like "1 day" or "2 hours" are accepted.
refresh	Optional boolean or function that returns boolean to force refresh. If TRUE or if function returns TRUE, cache is invalidated and expression is re-evaluated.
expire	Optional alias for `expire_after` (accepts the same formats)

Value

The cached value (if cache hit) or the result of evaluating expr (if cache miss or refresh requested)

Examples

if (FALSE) {
# Cache expensive computation
result <- cache_remember("my_analysis", {
  expensive_computation()
})
# Force refresh when data changes
result <- cache_remember("analysis", {
  run_analysis()
}, refresh = file.mtime("data.csv") > cache_time)
}