bonsai-analyzer/bin/stats/chunkSizesDiff.js

Trim your dependency tree.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = chunkSizesDiff;

var _invariant = _interopRequireDefault(require("invariant"));

function chunkSizesDiff(a, b) {
  const diffMap = {};
  a.forEach(file => {
    file.forEach(chunkSize => {
      if (!diffMap[chunkSize.name]) {
        diffMap[chunkSize.name] = {
          name: chunkSize.name,
          a: chunkSize,
          b: null,
          diff: null
        };
      } else {
        (0, _invariant.default)('we have the same chunk twice?');
      }
    });
  });
  b.forEach(file => {
    file.forEach(chunkSize => {
      if (!diffMap[chunkSize.name]) {
        diffMap[chunkSize.name] = {
          name: chunkSize.name,
          a: null,
          b: null,
          diff: null
        };
      } else {
        diffMap[chunkSize.name].b = chunkSize;
      }
    });
  });
  Object.keys(diffMap).forEach(name => {
    const chunkDiff = diffMap[name];
    const a = chunkDiff.a || {
      moduleCount: 0,
      totalSize: 0
    };
    const b = chunkDiff.b || {
      moduleCount: 0,
      totalSize: 0
    };
    chunkDiff.diff = {
      moduleCount: b.moduleCount - a.moduleCount,
      modulePercent: (b.moduleCount - a.moduleCount) / a.moduleCount,
      sizeCount: b.totalSize - a.totalSize,
      sizePercent: (b.totalSize - a.totalSize) / a.totalSize
    };
  });
  return diffMap;
}