c.js

c.js is a serialization/deserialization library for communiciating with kdb+'s native IPC format.

This repository is refactoring of the c.js project with performance improvements, bugfixes, and unit tests.

Why?

We have a project that requires fast, low-latency serialization of data from KDB+ to JSON.

This repository contains the following additions to the original project:

• Performance:
  • ~70-80% faster deserialization (kdb+ -> js)
  • 600%-1000% faster serialization (js -> kdb+)
• Full refactoring with type annotations.
• Added stream wrappers (require('c.js/lib/stream')) for easy consumption/production of kdb+ data.
• Bugfixes:
  • undefined -> null
  • Long null 0Nj was incorrectly serialized to -9223372036854776000. Now 0Nj, 0Ni, and 0Nh are all serialized to NaN.
  • Fixed incorrect timestamp rounding (precision error)
• Possibly breaking behavior:
  • JS strings are serialized to Symbols.
• Unit tests for all JS types and former c.js bugs, tests for few previously unfound bugs.
• Flow typing + ES6 syntax for source files.
• Make + Webpack build suite for Node.JS & browser output.
• Simple benchmark suite for keeping track of performance improvements and regressions.

Performance

Performance has improved over the reference c.js by 1.7x to 10x.

See the benchmark results.

Run the benchmark yourself with make benchmark.

Build

npm install
make build