http: move response_start_sent into the C ext

Combined with the previous commit to eliminate the `@socket'
instance variable, this eliminates the last instance variable
in the Unicorn::HttpRequest class.

Eliminating the last instance variable avoids the creation of a
internal hash table used for implementing the "generic" instance
variables found in non-pure-Ruby classes.  Method entry overhead
remains the same.

While this change doesn't do a whole lot for unicorn memory usage
where the HttpRequest is a singleton, it helps other HTTP servers
which rely on this code where thousands of clients may be connected.

0 files changed, 0 insertions, 0 deletions