wip: Performance improvements

[dblythy]

Pull Request

• Report security issues confidentially.
• Any contribution is under this license.
• Link this pull request to an issue.

Issue

Attempting to increase the parallel speed of Parse Server

Closes: #7404

Approach

Tasks

• Add tests
• Add changes to documentation (guides, repository pages, code comments)
• Add security check
• Add new Parse Error codes to Parse JS SDK

[parse-github-assistant]

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[dblythy]

For some reason I haven't worked out yet, this:

  fit('can save objects', async done => {
    const start_parellel = Date.now();
    await Parse.User.signUp('username', 'password');

    const objects = [];
    for (let i = 0; i < 1000; i++) {
      const obj = new Parse.Object('TestObj');
      obj.set('field1', 'uuid()');
      objects.push(obj);
      if ( i == 0) {
          await obj.save();
        }
      }
    await Promise.all(objects.map(o => o.save()));
    const end_parellel = Date.now() - start_parellel;
    console.log(end_parellel);
    expect(end_parellel).toBeLessThan(6000);
  });

Runs in 1500ms on my computer, whilst without await obj.save(), it takes 5000ms.