How frequently do servers use chunked encoding for various content types?

Ilya Grigorik wrote:

SELECT mimetype, resp_transfer_encoding, size, 
  ROUND(ratio*100) as percent FROM (
    SELECT mimeType, resp_transfer_encoding, size, 
      RATIO_TO_REPORT(size) OVER(PARTITION BY mimeType) ratio 
    FROM (
      SELECT mimeType, resp_transfer_encoding, 
        count(1) as cnt, sum(respSize) as size
      FROM [runs.2015_04_15_requests] 
      GROUP by mimeType, resp_transfer_encoding
      HAVING cnt > 10000
      ORDER BY mimeType, cnt
    ) 
)

• As of 04/2015, ~9% of responses are received via chunked transfers.
• There is significant variation between content types - e.g. 44% of HTML resources are chunked transfers.

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