CRP Diagrams with External CSS – Website Performance Optimization


All right. Let’s make things a bit more interesting. Same page as before, but now with an external CSS file. This time around we get the HTML response and start building DOM. We then discover the link tag and send the request for the CSS. In the meantime, we continue parsing the HTML and constructing the DOM, but note that we can’t render the page just yet because we’re still blocked and waiting for the CSS. Once the CSS does arrive and we finish building the CCS Object Model, we can paint the page.>>Gotcha.>>Now, I want you to figure out the critical path metrics.

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