[PATCH] reduce method calls with String#start_with?

[Eric Wong <e@80x24.org>]

These three cold call sites instruction sequence size by a few
hundred bytes combined since we no longer support Ruby 1.8.6.
The "?/" shorthand is esoteric and no longer avoids allocation
in Ruby 1.9+ (not that this is hot code).
---
 lib/unicorn/configurator.rb  | 2 +-
 lib/unicorn/http_server.rb   | 2 +-
 lib/unicorn/socket_helper.rb | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/unicorn/configurator.rb b/lib/unicorn/configurator.rb
index 7fb9030f..f34d38b8 100644
--- a/lib/unicorn/configurator.rb
+++ b/lib/unicorn/configurator.rb
@@ -587,7 +587,7 @@ def working_directory(path)
     # just let chdir raise errors
     path = File.expand_path(path)
     if config_file &&
-       config_file[0] != ?/ &&
+       ! config_file.start_with?('/') &&
        ! File.readable?("#{path}/#{config_file}")
       raise ArgumentError,
             "config_file=#{config_file} would not be accessible in" \
diff --git a/lib/unicorn/http_server.rb b/lib/unicorn/http_server.rb
index 3827f2e9..f33aa252 100644
--- a/lib/unicorn/http_server.rb
+++ b/lib/unicorn/http_server.rb
@@ -148,7 +148,7 @@ def start
   def listeners=(listeners)
     cur_names, dead_names = [], []
     listener_names.each do |name|
-      if ?/ == name[0]
+      if name.start_with?('/')
         # mark unlinked sockets as dead so we can rebind them
         (File.socket?(name) ? cur_names : dead_names) << name
       else
diff --git a/lib/unicorn/socket_helper.rb b/lib/unicorn/socket_helper.rb
index f52dde2d..9e672d97 100644
--- a/lib/unicorn/socket_helper.rb
+++ b/lib/unicorn/socket_helper.rb
@@ -116,7 +116,7 @@ def log_buffer_sizes(sock, pfx = '')
     def bind_listen(address = '0.0.0.0:8080', opt = {})
       return address unless String === address
 
-      sock = if address[0] == ?/
+      sock = if address.start_with?('/')
         if File.exist?(address)
           if File.socket?(address)
             begin
-- 
EW