response: avoid garbage string entirely

Even with 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...

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/rainbows/response.rb b/lib/rainbows/response.rb
index 0b5e542..3e48c65 100644
--- a/lib/rainbows/response.rb
+++ b/lib/rainbows/response.rb
@@ -46,8 +46,8 @@ module Rainbows::Response
         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