diff --git a/Gemfile b/Gemfile
index d695524b..2b39c8f0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -32,6 +32,7 @@ gem 'test-unit' if RUBY_PLATFORM =~ /cygwin/ || RUBY_VERSION.start_with?("2.2")
 if ENV['BENCHMARK']
   gem 'rbtrace'
   gem 'stackprof'
+  gem 'benchmark-ips'
 end
 
 if ENV['PROOF']
diff --git a/benchmark/end-with-vs-regexp b/benchmark/end-with-vs-regexp
new file mode 100644
index 00000000..cb849f42
--- /dev/null
+++ b/benchmark/end-with-vs-regexp
@@ -0,0 +1,13 @@
+require 'benchmark/ips'
+
+Benchmark.ips do |x|
+  path_without_ending_slash = '/some/very/very/long/path/to/a/file/i/like'
+  x.report('no slash regexp')    { path_without_ending_slash =~ /\/$/ }
+  x.report('no slash end_with?') { path_without_ending_slash.end_with?("/")  }
+end
+
+Benchmark.ips do |x|
+  path_with_ending_slash = '/some/very/very/long/path/to/a/file/i/like/'
+  x.report('slash regexp')    { path_with_ending_slash =~ /\/$/ }
+  x.report('slash end_with?') { path_with_ending_slash.end_with?("/")  }
+end
diff --git a/lib/jekyll/document.rb b/lib/jekyll/document.rb
index 048dcdbf..e22e8cf1 100644
--- a/lib/jekyll/document.rb
+++ b/lib/jekyll/document.rb
@@ -163,7 +163,7 @@ module Jekyll
     def destination(base_directory)
       dest = site.in_dest_dir(base_directory)
       path = site.in_dest_dir(dest, URL.unescape_path(url))
-      path = File.join(path, "index.html") if url =~ /\/$/
+      path = File.join(path, "index.html") if url.end_with?("/")
       path
     end
 
diff --git a/lib/jekyll/page.rb b/lib/jekyll/page.rb
index 98f730bf..2db39141 100644
--- a/lib/jekyll/page.rb
+++ b/lib/jekyll/page.rb
@@ -141,7 +141,7 @@ module Jekyll
     # Returns the destination file path String.
     def destination(dest)
       path = site.in_dest_dir(dest, URL.unescape_path(url))
-      path = File.join(path, "index.html") if url =~ /\/$/
+      path = File.join(path, "index.html") if url.end_with?("/")
       path
     end
 
diff --git a/lib/jekyll/post.rb b/lib/jekyll/post.rb
index c74522a9..45b6d0d2 100644
--- a/lib/jekyll/post.rb
+++ b/lib/jekyll/post.rb
@@ -279,7 +279,7 @@ module Jekyll
     def destination(dest)
       # The url needs to be unescaped in order to preserve the correct filename
       path = site.in_dest_dir(dest, URL.unescape_path(url))
-      path = File.join(path, "index.html") if self.url =~ /\/$/
+      path = File.join(path, "index.html") if self.url.end_with?("/")
       path
     end