kruda.js

Fast data pipeline in the browser.
This is a derivative work of BigDataParser by Dario Segura

WARNING: This is pre-release software under active development.

Installation

yarn add @uncharted.software/kruda

or

npm install @uncharted.software/kruda

Usage

• www/index.html has a working example you can look at.
• Look at the documentation

Running the example.

• Run yarn install
• Download airport data (Airports2.csv)
• Run node ./src/DSBIN/node/generateDSBIN.js /path/to/Airports2.csv ./www/data/flight_routes.ds.bin (change /path/to/Airports2.csv to the location where you stored the Airports2.csv file) to convert Airports2.csv to the .ds.bin format.
• Run yarn start
• In Chrome (must be chrome for now) navigate to localhost:8090
  • The example will allocate a 2GB memory heap
  • Load the generated flight routes ds.bin file (~3.6 million rows)
  • Apply a filter to it where:
    • The origin airport code equals SEA
      and
    • The number of passengers equals 110
      and
    • The destination airport code is not equal to LAX
  • OR:
    • The origin airport code equals MCO
      and
    • The number of passengers is more than 180
      and
    • The number of passengers is less than 200
      and
    • The flight date contains 2001
• On a laptop running a 4th gen 2.5GHz intel i7 quad core processor:
  • Allocating 2GB of memory takes ~1242ms
  • Loading the ds.bin file (~38MB, ~500MB uncompressed) takes ~861ms
  • Filtering all ~3.6 million rows with the rules above takes ~115ms
  • Filtering all ~3.6 million rows with a filter that returns every single row takes ~462ms

Debugging

Unfortunately many error checks must be disabled for the sake of performance, if statements are very expensive!
You can re-enable them by changing the flag _DEBUG in the rollup.config.js file:

jscc({
    prefixes: '/// ',
    sourcemap: false,
    values: {
        _DEBUG: false, // <<<<<< CHANGE THIS LINE TO `true`
    },
}),