Jay Garcia wrote:
On 19.05.2011 15:56, Paul B. Gallagher wrote:
--- Original Message ---
Jay Garcia wrote:
Since a prefetched page(s) is/are put to cache, I don't know if
there is any indication that those pages are the ones
"prefetched".
And .. I think that this prefetch function is only workable as
intended with a slow dialup type connection. My main website
with over 800 pages is quickly accessed to any page from any page
quite quickly. I don't really think I could tell the difference
with/without prefetch.
I like to watch videos online, and even with a broadband
connection (about 25 MB/min or 1500 kBps), they can sometimes take
awhile to load (probably due to slow/busy servers). For example, if
my 36-minute program is broken into three 12-minute chunks, I
routinely open three tabs, and launch all three chunks, then
quickly pause the second and third ones, allowing them to load
without playing. I view the first one, and by the time I'm done,
the second is ready to go. Automatic prefetching could come in
handy here, especially since the website links the second and third
chunks to the first and I have bandwidth to burn.
Prefetch does nothing the first time you access the videos. And I
don't think that's the purpose of prefetching anyway. Prefetch as I
understand it is for pages with multiple links referencing other
pages on the same site,
... which is exactly the case I'm describing. The page that embeds part
1 of the vid has a link to part 2, and I could watch all of part 1 and
then click the link, or else I could right-click the link and say "open
in new tab." The second option is the one I choose -- I'm doing manual
prefetching, so that when I'm finished with part 1, part 2 is loaded and
ready to go. Some of the sites I visit even recommend this buffering
technique to avoid choppiness when a server can't keep up.
e.g., the prefetch link in the header of the index page would
reflect <link rel="prefetch" ..>.
... and that's the answer to the OP's question: look in the source code
for <link rel="prefetch" ...>. If it has such a link, it's set up for
prefetching; if not, it's not.
--
War doesn't determine who's right, just who's left.
--
Paul B. Gallagher
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