proxy_http_response: reduce memory pressure from larger headers

We try to cleanup after ourselves if possible so future mallocs
can find memory more easily.  We do not need to nil the object
slot, just String#clear since we're exiting the function soon,
anyways.

Followup to commit bb774680aae0a827f887761b18da304aa94111cc
("use String#clear for short-lived buffers we create")

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/yahns/proxy_http_response.rb b/lib/yahns/proxy_http_response.rb
index 1776291..7df2834 100644
--- a/lib/yahns/proxy_http_response.rb
+++ b/lib/yahns/proxy_http_response.rb
@@ -132,7 +132,9 @@ module Yahns::HttpResponse # :nodoc:
 
     # send the headers
     case rv = kgio_syssend(res, flags)
-    when nil then break # all done, likely
+    when nil # all done, likely
+      res.clear
+      break
     when String # partial write, highly unlikely
       flags = MSG_DONTWAIT
       res = rv # hope the skb grows