1 files changed, 5 insertions, 7 deletions
diff --git a/lib/rainbows/fiber/io.rb b/lib/rainbows/fiber/io.rb
index 94996ee..6c3d91c 100644
--- a/lib/rainbows/fiber/io.rb
+++ b/lib/rainbows/fiber/io.rb
@@ -59,19 +59,17 @@ class Rainbows::Fiber::IO
      else
        begin
          (rv = @to_io.write_nonblock(buf)) == buf.bytesize and return
-        buf = byte_slice(buf, rv..-1)
+        buf = byte_slice(buf, rv)
        rescue Errno::EAGAIN
          kgio_wait_writable
        end while true
      end
    end
  
-  def byte_slice(buf, range) # :nodoc:
-    if buf.encoding != Encoding::BINARY
-      buf.dup.force_encoding(Encoding::BINARY)[range]
-    else
-      buf[range]
-    end
+  def byte_slice(buf, start) # :nodoc:
+    buf.encoding == Encoding::BINARY or
+      buf = buf.dup.force_encoding(Encoding::BINARY)
+    buf.slice(start, buf.size)
    end
  
    # used for reading headers (respecting keepalive_timeout)