rapid-stream

Through stream that processes elements in parallel, with no regard for input order.

Similar to parallel-transform, however because it ignores input order it can process input faster when incoming chunks take a variable amount of time to resolve, e.g. network requests behind a caching layer.

Usage

rapid(parallelism, [opts], handle)

Creates a new rapid stream that will handle at most parallelism chunks at any one time. Optionally, you may pass in opts to override the default stream options. Note that this is an object mode stream by default.

handle(chunk, encoding, next) is called for each incoming chunk, and works more or less the same as it does in through2.

const RapidStream = require('rapid-stream')
const from2       = require('from2')
 
var stream = RapidStream(2, function(chunk, encoding, next) {
  setTimeout(function() {
    next(null, chunk)
  }, 1000 * Math.random())
})
 
from2([1, 2, 3, 4, 5]).pipe(stream).on('data', function(data) {
  console.log(data)
})
 
// 2
// 1
// 3
// 5
// 4

License

MIT. See LICENSE.md for details.