How to Make Chrome Not Load Tabs Until They are Selected?

I have over 20 tabs opened in Chrome and need to restart browser from time to time. This browser does not have option similar to Firefox's "Do not load tabs until selected" loading tabs only after selecting them. I have tried a few Chrome extensions but none do what I am looking for.

At the time of this writing, Chrome does not support this functionality natively. I've been using The Great Suspender, an extension that adds similar functionality to Chrome.

You can verify the memory and CPU savings you gain while using this extension by opening the Chrome Task Manager: Menu > More tools > Task manager

Since Chrome 54 (Oct 2016) this feature is supported in Chrome natively, so previous bloated extensions are not that needed. A GNU GPLv3 licensed extension Native Lazy Tabs extension works and it is very small: 33 KiB.

Citing extension description:

Automatically discards all tabs at startup, before they load, reducing memory footprint and unnecessary bandwidth usage.

Native Lazy Tabs is a light extension for users that don't want to load all tabs when Chrome is started. It's native because it uses the native tab discarding method from the Google API (introduced in version 54). Also, because of that, it doesn't have the shortcomings of older implementations that could cause bugs like the pages reloading itself even after suspended.

Moreover, this extension doesn't use any memory because there's no need for a background page: it loads and unloads itself after Chrome is started.