https://github.com/r-k-b/backpressure-queue

Pipe nodejs streams into an async.queue for parallelisation, get backpressure when the queue is full.
https://github.com/r-k-b/backpressure-queue

backpressure parallel queue streams

Last synced: 2 months ago
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Pipe nodejs streams into an async.queue for parallelisation, get backpressure when the queue is full.

• Host: GitHub
• URL: https://github.com/r-k-b/backpressure-queue
• Owner: r-k-b
• License: gpl-3.0
• Created: 2017-09-21T05:12:53.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2025-04-26T00:21:13.000Z (2 months ago)
• Last Synced: 2025-04-26T01:27:13.343Z (2 months ago)
• Topics: backpressure, parallel, queue, streams
• Language: TypeScript
• Homepage: https://www.npmjs.com/package/backpressure-queue
• Size: 1010 KB
• Stars: 8
• Watchers: 2
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# backpressure-queue

![Node.js CI](https://github.com/r-k-b/backpressure-queue/workflows/Node.js%20CI/badge.svg?branch=master)

Returns a Writable ObjectMode Stream that allows a certain number of

simultaneous promises, and triggers stream backpressure when the

concurrency limit is hit.

Errors are swallowed.

The return value of doWork() is ignored, and cannot be retrieved.

Usage:

    async function foo(someItem) {

      console.log('work done on ' + someItem)

      return

    }

    

    const w = writableQueue({doWork: foo, limitConcurrent: 2})

    

    someSourceStream.pipe(w)