JSON8 Text Sequence

Introduction

JSON Text Sequence RFC 7464 toolkit for JavaScript.

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• JSON8 Text Sequence
  • Introduction
  • Getting started
  • SerializeStream
  • ParseStream
  • Benchmark

Getting started

npm install json8-text-sequence

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const textSequence = require("json8-text-sequence");

SerializeStream

Implements Node.js Writable Stream.

Example

const { createWriteStream } = require("fs");
const textSequence = require("json8-text-sequence");

const writeStream = createWriteStream("example.log", { flags: "a" });
const serializeStream = new textSequence.SerializeStream();

serializeStream.pipe(writeStream);

setInterval(() => {
  // sequence can be any valid JSON value
  // string, boolean, array, object, ...
  const sequence = {
    date: Date.now(),
    value: Math.random().toString().slice(2),
  };
  serializeStream.write(sequence);
}, 500);

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ParseStream

Implements Node.js Readable Stream.

const { createReadStream } = require("fs");
const textSequence = require("json8-text-sequence");

const readStream = createReadStream("example.log");
const parseStream = new textSequence.ParseStream();

readStream.pipe(parseStream);

// Sequence is truncated
parseStream.on("truncated", (sequence) => {
  console.log("truncated sequence", sequence);
});

// Sequence is not valid JSON
parseStream.on("invalid", (sequence) => {
  console.log("invalid sequence", sequence);
});

parseStream.on("data", (json) => {
  console.log(json);
});

Benchmark

git clone git@github.com:sonnyp/JSON8.git
npm install
cd JSON8/packages/text-sequence
node benchmark

On my computer (read/parse a 900kB application/json-seq file from disk):

json-text-sequence x 73 ops/sec ±4.64% (74 runs sampled)
json8-text-sequence x 584 ops/sec ±5.81% (66 runs sampled)
Fastest is json8-text-sequence

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