[PATCH 3/5] response: avoid garbage string entirely

[Eric Wong <e@80x24.org>]

Even in frozen string literals enabled in Ruby 2.3.0dev,
dstrings still create garbage as the optimizer is
not yet smart enough to optimize it despite the limited
choice of internals being known.

Maybe in the future Ruby will be smart enough, but not yet...
---
 lib/rainbows/response.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/rainbows/response.rb b/lib/rainbows/response.rb
index 9bbea81..ac50321 100644
--- a/lib/rainbows/response.rb
+++ b/lib/rainbows/response.rb
@@ -46,8 +46,8 @@ def write_headers(status, headers, alive, body)
         end
       end
     end
-    write(buf << "Connection: #{alive ? 'keep-alive'.freeze
-                                      : 'close'.freeze}\r\n\r\n")
+    write(buf << (alive ? "Connection: keep-alive\r\n\r\n".freeze
+                        : "Connection: close\r\n\r\n".freeze))
 
     if hijack
       body = nil # ensure caller does not close body
-- 
EW