it'd be nice to run a benchmark. I wonder why ap_save_brigade was marked as ! in the map file. Which normally means it's not going to be exposed. Did you by chance look at the archives for possible references to it?
there's a mention of it in the APR::Bucket manpage. i couldn't find anything else aside from a thread on dev@httpd.apache.org:
http://www.mail-archive.com/dev@httpd.apache.org/msg22884.html
and something else i wrote to this list asking about it.
it's been labeled ! since its initial revision in svn though, apparently.
perhaps dougm could shed some light?
i came across the function via http://www.outoforder.cc/projects/apache/mod_transform/ , where the author uses it to retrieve arbitrary output from what may or may not actually be a file on the filesystem. i've been using it to do things like feeding subversion PROPFIND responses into xslt processors.
It will work just the same when flattening the data on each request. I'm not sure what happens when a filehandle bucket is setaside, but normal buckets will be copied, that's why it'd be interesting to see a benchmark whether it's a better idea to use that approach.
Joe, do you have any insights on this topic?
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