prune

# File activesupport/lib/active_support/cache/memory_store.rb, line 114
      def prune(target_size, max_time = nil)
        return if pruning?
        @pruning = true
        begin
          start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
          cleanup
          instrument(:prune, target_size, from: @cache_size) do
            keys = synchronize { @data.keys }
            keys.each do |key|
              delete_entry(key, **options)
              return if @cache_size <= target_size || (max_time && Process.clock_gettime(Process::CLOCK_MONOTONIC) - start_time > max_time)
            end
          end
        ensure
          @pruning = false
        end
      end