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    through2-concurrent
    DefinitelyTyped icon, indicating that this package has TypeScript declarations provided by the separate @types/through2-concurrent package

    2.0.0 • Public • Published

    through2-concurrent

    NPM

    A simple way to create a Node.JS Transform stream which processes in parallel. You can limit the concurrency (default is 16) and order is not preserved (so chunks/objects can end up in a different order to the order they started in if the transform functions take different amounts of time).

    Built using through2 and has the same API with the addition of a maxConcurrency option.

    Non-objectMode streams are supported for completeness but I'm not sure they'd be useful for anything.

    Written by Thomas Parslow (almostobsolete.net and tomparslow.co.uk) as part of Active Inbox (activeinboxhq.com).

    Build Status

    Install

    npm install --save through2-concurrent

    Examples

    Process lines from a CSV in paralel. The order the results end up in the all variable is not deterministic.

    var through2Concurrent = require('through2-concurrent');
     
    var all = [];
     
    fs.createReadStream('data.csv')
      .pipe(csv2())
      .pipe(through2Concurrent.obj(
        {maxConcurrency: 10},
        function (chunk, enc, callback) {
          var self = this;
          someThingAsync(chunk, function (newChunk) {
            self.push(newChunk);
            callback();
          });
      }))
      .on('data', function (data) {
        all.push(data)
      })
      .on('end', function () {
        doSomethingSpecial(all)
      })

    Contributing

    Fixed or improved stuff? Great! Send me a pull request through GitHub or get in touch on Twitter @almostobsolete or email at tom@almostobsolete.net

    Install

    npm i through2-concurrent

    DownloadsWeekly Downloads

    139,944

    Version

    2.0.0

    License

    MIT

    Unpacked Size

    6.86 kB

    Total Files

    4

    Last publish

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