Parallel Stream v1.0.6 ParallelStream.Mapper

The map iterator implementation

Summary

Functions

Creates a stream that will apply the given function on enumeration in parallel and return the functions return value

Functions

map(stream, mapper, options \\ [])

Creates a stream that will apply the given function on enumeration in parallel and return the functions return value.

Options

These are the options:

  • :num_workers – The number of parallel operations to run when running the stream.
  • :worker_work_ratio – The available work per worker, defaults to 5. Higher rates will mean more work sharing, but might also lead to work fragmentation slowing down the queues.

Examples

Map and duplicate the numbers:

iex> parallel_stream = 1..5 |> ParallelStream.map(fn i -> i * 2 end)
iex> parallel_stream |> Enum.to_list
[2, 4, 6, 8, 10]