While the inline script is executing, all other downloads are blocked.
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In addition to blocking parallel downloads, inline scripts block rendering.
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If your site uses inline scripts, it’s important to understand how they block downloads and rendering, and to avoid this behavior if possible. Several workarounds are available:
• Move inline scripts to the bottom.
• Initiate the JavaScript execution using an asynchronous callback.
• Use the SCRIPT DEFER attribute.
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Although this technique(Move inline scripts to the bottom) avoids blocking downloads, rendering is still blocked. 引自第70页
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