Applications

• Install dependencies: mix deps.get
• Start a new iex session iex -S mix
• Start the observer to view the memory use: iex> :observer.start
• Generate 100 applications using: iex> Applications.create(100, 20, 20)
• or you can measure the performance using: iex> :timer.tc(Applications, :create, [100, 100, 100]) (100, 100, 100 is the limit) and can last until 10 minutes in be created
• Applications will be saved into storage directory
• Force a garbage collection with: iex> :erlang.garbage_collect()
• Load the applications in memory with iex> bb = Applications.load()
• Now you can play with the bb map
  • iex> first_app_id = bb |> Map.keys() |> hd()
  • iex> first_app = Map.get(bb, first_app_id)
  • iex> first_text_id = first_app |> Map.keys() |> hd()
  • iex> Map.get(first_app, first_text_id)

The biggest map has 10_000 keys with text (100 x 100). If we pass the text to a word processor we're talking of 4.000 pages of text without white lines.

The biggest map (an improbable application) has a size of 20Mb in memory and about 5Mb in disk. A normal metadata should be a fraction of this size.

A modest map, about 400 keys with text, has a size of 1Mb in memory and 200Kb in disk.

Load 400 modest applications from disk takes 1.2 seconds (3 milliseconds by application)