Chrome extension performance

I have developed a ch开发者_如何转开发rome extension. The extension itself works fine and fast.

But when I start the browser and click on the toolbar icon of my extension it takes about 2 seconds for the popup to appear and to show its content (this happens anytime the browser is restarted).

Any idea what causes this and how to fix that?

Tip 1:

Use your popup page for rendering exclusively. It should be as light as possible. All the heavy loading/processing (localStorage, XMLHttpRequests, blocking javascript) must be done in the background page.

The background page is loaded when Google Chrome starts. Basically, it allows you to execute code and keep a page always running (although the popup is not present). For instance, streaming audio in a html5 tag with no popup.

Note: If you are not using a background page yet, you should be taking a look to message passing first.

Tip 2: Warning: This could fail

I haven't tested this yet, but maybe using the HTML5 manifest.cache can help you preventing loading again resources stored locally. But beware, this is HTML5 and is prone to changes and unstability across versions. (also, I am not completely sure that the cached resources will be loaded in memory before the popup is opened)

Hope it helps!