[PATCH] stream_input: favor str.clear instead of str.replace('')

[Eric Wong]

String#clear has a simpler dispatch and requires no object
allocation.  The only reason we used String#replace before
was because it was inherited from a Ruby 1.8-compatible
project where String#clear was not available.
---
 lib/yahns/stream_input.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/yahns/stream_input.rb b/lib/yahns/stream_input.rb
index eea3a0a..d32ff66 100644
--- a/lib/yahns/stream_input.rb
+++ b/lib/yahns/stream_input.rb
@@ -50,7 +50,7 @@ class Yahns::StreamInput # :nodoc:
           rv << @rbuf
           to_read -= @rbuf.size
         end
-        @rbuf.replace('')
+        @rbuf.clear
       end
       rv = nil if rv.empty? && length != 0
     else
@@ -137,7 +137,7 @@ class Yahns::StreamInput # :nodoc:
       dst << @rbuf
     end
   ensure
-    @rbuf.replace('')
+    @rbuf.clear
   end
 
   def eof!
-- 
EW