Hah! It turns out that "duration" includes blocking time - so it is NOT an accurate measure of the DOWNLOAD time for a resource. I added "download" as a capture of the actual download time - it is the sum of dns + tcp + ttfb + content. (Note that tcp INCLUDES ssl so we do not need to include "ssl" in this sum.) Base the "slowest" resource on download time (instead of duration).
Hah! It turns out that "duration" includes blocking time - so it is NOT an accurate measure of the DOWNLOAD time for a resource. I added "download" as a capture of the actual download time - it is the sum of dns + tcp + ttfb + content. (Note that tcp INCLUDES ssl so we do not need to include "ssl" in this sum.) Base the "slowest" resource on download time (instead of duration).

stevesouders/episodes,stevesouders/episodes