From 20214d753e15aefee645bfaf44a72b91c60c0e90 Mon Sep 17 00:00:00 2001
From: Oleksandr Avoiants <shhavel@gmail.com>
Date: Wed, 6 Apr 2016 20:09:13 +0300
Subject: [PATCH] Use String interpolation or << instead plus which are faster

---
 lib/rack/auth/digest/params.rb  | 3 +--
 lib/rack/common_logger.rb       | 2 +-
 lib/rack/directory.rb           | 2 +-
 lib/rack/multipart/generator.rb | 2 +-
 lib/rack/multipart/parser.rb    | 2 +-
 5 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/rack/auth/digest/params.rb b/lib/rack/auth/digest/params.rb
index f35a7bab8..90ad873f5 100644
--- a/lib/rack/auth/digest/params.rb
+++ b/lib/rack/auth/digest/params.rb
@@ -38,7 +38,7 @@ def []=(k, v)
 
         def to_s
           map do |k, v|
-            "#{k}=" + (UNQUOTED.include?(k) ? v.to_s : quote(v))
+            "#{k}=" << (UNQUOTED.include?(k) ? v.to_s : quote(v))
           end.join(', ')
         end
 
@@ -50,4 +50,3 @@ def quote(str) # From WEBrick::HTTPUtils
     end
   end
 end
-
diff --git a/lib/rack/common_logger.rb b/lib/rack/common_logger.rb
index 1ec8266d6..ae410430e 100644
--- a/lib/rack/common_logger.rb
+++ b/lib/rack/common_logger.rb
@@ -48,7 +48,7 @@ def log(env, status, header, began_at)
         now.strftime("%d/%b/%Y:%H:%M:%S %z"),
         env[REQUEST_METHOD],
         env[PATH_INFO],
-        env[QUERY_STRING].empty? ? "" : "?"+env[QUERY_STRING],
+        env[QUERY_STRING].empty? ? "" : "?#{env[QUERY_STRING]}",
         env[HTTP_VERSION],
         status.to_s[0..3],
         length,
diff --git a/lib/rack/directory.rb b/lib/rack/directory.rb
index 554f9c337..5baee3c89 100644
--- a/lib/rack/directory.rb
+++ b/lib/rack/directory.rb
@@ -155,7 +155,7 @@ def filesize_format(int)
         return format % (int.to_f / size) if int >= size
       end
 
-      int.to_s + 'B'
+      "#{int}B"
     end
   end
 end
diff --git a/lib/rack/multipart/generator.rb b/lib/rack/multipart/generator.rb
index 6367135f4..f0b70a8d6 100644
--- a/lib/rack/multipart/generator.rb
+++ b/lib/rack/multipart/generator.rb
@@ -22,7 +22,7 @@ def dump
           else
             content_for_other(file, name)
           end
-        end.join + "--#{MULTIPART_BOUNDARY}--\r"
+        end.join << "--#{MULTIPART_BOUNDARY}--\r"
       end
 
       private
diff --git a/lib/rack/multipart/parser.rb b/lib/rack/multipart/parser.rb
index 567c868d8..74a7ee67f 100644
--- a/lib/rack/multipart/parser.rb
+++ b/lib/rack/multipart/parser.rb
@@ -26,7 +26,7 @@ def read(size)
           str = if left < size
                   @io.read left
                 else
-                 @io.read size
+                  @io.read size
                 end
 
           if str