bit-calculator.js

/**
* calculateBits function can be used to get a rough measurement of how much
* memory a JavaScript object costs
*
* @author Mark Auger
* @social Follow me on GitHub at https://github.com/swimauger
* @license
* Copyright (c) 2021 Mark Auger
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* @param {any} value is any boolean, number, string, function, array, or object
* @return {number} the number of bits in value
**/
function calculateBits(value) {
    switch (typeof value) {
        case 'boolean':
          // A Boolean in bits is a 0 or 1 aka 1 bit
          return 1;
        case 'number':
          // A Number in bits can be calculated by converting to binary then the number of bits in it
          return value.toString(2).length;
        case 'string':
          // A String in bits can be calculated by taking the ASCII number value, then number to above
          return value.split('').reduce((pv, char) => {
            return pv + calculateBits(char.charCodeAt(0));
          }, 0);
        case 'function':
          // A Function in bits can be calculated by stringifying it, then string to above
          return calculateBits(value.toString());
        case 'object':
          // An Array in bits can be calculated by adding all bits calculated from each element
          if (value instanceof Array) {
            return value.reduce((pv, element) => pv + calculateBits(element), 0);
          } else {
            // An Object in bits can be calculated by adding all bits calculated from keys and values
            return calculateBits(Object.keys(value)) + calculateBits(Object.values(value));
          }
    }
}