pull-backoff

pull-stream source for exponential backoff intervals

Usage no npm install needed!

<script type="module">
  import pullBackoff from 'https://cdn.skypack.dev/pull-backoff';
</script>

README

pull-backoff

npm install --save pull-backoff

Creates a pull-stream that emits numbers in exponential backoff periods of time.

Description

Periodically deliver incremental numbers, where the interval of time varies exponentially, up to an (optional) maximum interval of time.

Marble diagram:

           backoff(500, 2, 6000)
-0---1-------2---------------3-----------------------4----...

intervals:
500ms
    1s
            2s
                            4s
                                                    6s

Arguments:

  • interval: initial interval of time expressed in milliseconds
  • factor: (optional, default 2) how much to multiply the previous interval each time the stream emits
  • maximum: (optional, default Infinity) the maximum interval at which to limit the interval calculation

Usage

const pull = require('pull-stream')
const backoff = require('pull-backoff')

pull(
  backoff(500, 2, 6000),
  pull.take(5),
  pull.drain(i => console.log(i))
)

> 0
> 1
> 2
> 3
> 4

License

MIT