to-fast-properties 

Force V8 to use fast properties for an object

Read more.

Use %HasFastProperties(object) and --allow-natives-syntax to check whether an object already has fast properties.

Install

$ npm install --save to-fast-properties

Usage

js
const toFastProperties = require('to-fast-properties');

const obj = {
	foo: true,
	bar: true
};

delete obj.foo;
// `obj` now has slow properties

toFastProperties(obj);
// `obj` now has fast properties

License

MIT © Petka Antonov, John-David Dalton, Sindre Sorhus