| 摘要 |
A client device requests, from a particular server, a document for presentation in a browser associated with the client device, and receives the document. The client device calculates one or more connection performance values for the document and determines whether the one or more connection performance values are below a threshold value. The client device sends, to another server, a request for another document, for presentation in the browser, where the request for the other document includes an indication of whether the one or more connection performance values are below the threshold value. The client device receives a first version of the other document when the connection performance is below the threshold value and receives a second version of the other document when the connection performance is greater than or equal to the threshold value, where the first version includes less rich content than the second version.
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