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🌲 Great Elixir Logging Made Easy. Official Timber.io Integration.
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lib/timber/timer.ex
defmodule Timber.Timer do
@moduledoc false
@precision 6
@doc """
Starts a timer for timing code execution. This timer can then be passed
to `Timber.Timer.duration_ms/1`.
## Example
iex> timer = Timber.Timer.start_timer()
iex> # ... code to time ...
iex> ms = Timber.Timer.duration_ms(timer)
"""
def start(), do: System.monotonic_time()
@doc """
Calculates the duration of timer in milliseconds. The millisecond
returned is a Float with a default precision of 4. You can modify
this by passing a new precision as the second argument.
"""
def duration_ms(timer, precision \\ @precision) do
(System.monotonic_time() - timer)
|> System.convert_time_unit(:native, :nanoseconds)
|> divide_by_milliseconds()
|> Float.round(precision)
end
defp divide_by_milliseconds(time) do
time / 1_000_000
end
end