Roy T. Fielding wrote:

> A better optimization might be to reduce the number of calls to
> brigade_puts.  That's how much of 1.3 was improved.


I only know of three ways to reduce the number of apr_brigade_puts()
calls in 2.0:

  * Send fewer fields in the HTTP response header.

  * Or do more buffering prior to calling apr_brigade_puts().
    (This is what 2.0 used to do, and it was even slower, because
    it added yet another layer of memory copying before the socket
    write.)

  * Or produce a separate bucket for each field in the response
    header, and rely on writev to patch them together.
    (This won't work in 2.0; if the number of tiny buckets
    grows too large, core_output_filter() will try to consolidate
    them into a single bucket, with the associated memcpy cost.)

Were you thinking of a different approach from these?

--Brian