npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@finn-no/stoppable

v1.1.1

Published

> This is a fork of https://github.com/hunterloftis/stoppable until https://github.com/hunterloftis/stoppable/pull/7 is merged

Downloads

5

Readme

Stoppable

This is a fork of https://github.com/hunterloftis/stoppable until https://github.com/hunterloftis/stoppable/pull/7 is merged

Node's server.close() the way you probably expected it to work by default.

const server = stoppable(http.createServer(handler))
server.stop()

Stoppable stops accepting new connections and closes existing, idle connections (including keep-alives) without killing requests that are in-flight.

Build Status

Installation

yarn add stoppable

(or use npm)

Usage

constructor

stoppable(server, grace)

Decorates the server instance with a stop method. Returns the server instance, so can be chained, or can be run as a standalone statement.

  • server: Any HTTP or HTTPS Server instance
  • grace: Milliseconds to wait before force-closing connections

grace defaults to Infinity (don't force-close). If you want to immediately kill all sockets you can use a grace of 0.

stop()

server.stop(callback)

Closes the server.

  • callback: passed along to the existing server.close function to auto-register a 'close' event

Design decisions

  • Monkey patching generally sucks, but in this case it's the nicest API. Let's call it "decorating."
  • grace could be specified on stop, but it's better to match the existing server.close API.
  • Clients should be handled respectfully, so we aren't just destroying sockets, we're sending FIN packets first.
  • Any solution to this problem requires bookkeeping on every connection and request/response. We're doing a minimum of work on these "hot" code paths and delaying as much as possible to the actual stop method.

Performance

There's no way to provide this functionality without bookkeeping on connection, disconnection, request, and response. However, Stoppable strives to do minimal work in hot code paths and to use optimal data structures.

I'd be interested to see real-world performance benchmarks; the simple loopback artillery benchmark included in the lib shows very little overhead from using a stoppable server:

Without Stoppable

  Scenarios launched:  10000
  Scenarios completed: 10000
  Requests completed:  10000
  RPS sent: 939.85
  Request latency:
    min: 0.5
    max: 51.3
    median: 2.1
    p95: 3.7
    p99: 15.3
  Scenario duration:
    min: 1
    max: 60.7
    median: 3.6
    p95: 7.6
    p99: 19
  Scenario counts:
    0: 10000 (100%)
  Codes:
    200: 10000

With Stoppable

  Scenarios launched:  10000
  Scenarios completed: 10000
  Requests completed:  10000
  RPS sent: 940.73
  Request latency:
    min: 0.5
    max: 43.4
    median: 2.1
    p95: 3.8
    p99: 15.5
  Scenario duration:
    min: 1.1
    max: 57
    median: 3.7
    p95: 8
    p99: 19.4
  Scenario counts:
    0: 10000 (100%)
  Codes:
    200: 10000