recoil/cjs/core/__tests__/Recoil_perf-test.js.flow

Recoil - A state management library for React

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @emails oncall+obviz
 * @flow strict-local
 * @format
 */
'use strict';

import type { Loadable, RecoilState, RecoilValue } from '../../Recoil_index';

const {
  atom,
  selector
} = require('../../Recoil_index');

const {
  getRecoilValueAsLoadable,
  setRecoilValue
} = require('../Recoil_RecoilValueInterface');

const {
  performance
} = require('perf_hooks');

const {
  makeStore
} = require('recoil-shared/__test_utils__/Recoil_TestingUtils');

const ITERATIONS = [1]; // Avoid iterating for automated testing
// const ITERATIONS = [2, 2];
// const ITERATIONS = [10, 100, 1000];
// const ITERATIONS = [10, 100, 1000, 10000];
// const ITERATIONS = [10, 100, 1000, 10000, 100000];

declare function testPerf(name: string, fn: (number) => void): any;
let store = makeStore();
declare function getNodeLoadable<T>(recoilValue: RecoilValue<T>): Loadable<T>;
declare function getNodeValue<T>(recoilValue: RecoilValue<T>): T;
declare function setNode(recoilValue: any, value: mixed): any;
let nextAtomKey = 0;
declare function createAtoms(num: any): Array<RecoilState<string>>;
declare var helpersSelector: () => any;
declare var getHelpers: () => any;
testPerf('creating n atoms', iterations => {
  createAtoms(iterations);
});
testPerf('getting n atoms', iterations => {
  const atoms = createAtoms(iterations);

  for (const node of atoms) {
    getNodeValue(node);
  }
});
testPerf('setting n atoms', iterations => {
  const atoms = createAtoms(iterations);

  for (const node of atoms) {
    setNode(node, 'SET');
  }
});
testPerf('cloning n snapshots', iterations => {
  const atoms = createAtoms(iterations);
  const {
    getSnapshot
  } = getHelpers();

  for (const node of atoms) {
    // Set node to avoid hitting cached snapshots
    setNode(node, 'SET');
    const snapshot = getSnapshot();
    expect(getNodeValue(node)).toBe('SET');
    expect(snapshot.getLoadable(node).contents).toBe('SET');
  }
});