Avoid reading .inputrc repeatedly

lib/reline.rb

@@ -335,7 +335,7 @@ def readline(prompt = '', add_hist = false)
         end
       end
 
-      unless config.test_mode
+      unless config.test_mode or config.loaded?
         config.read
         config.reset_default_key_bindings
         io_gate.set_default_key_bindings(config)

lib/reline/config.rb

@@ -69,6 +69,7 @@ def initialize
     @test_mode = false
     @autocompletion = false
     @convert_meta = true if seven_bit_encoding?(Reline::IOGate.encoding)
+    @loaded = false
   end
 
   def reset
@@ -98,6 +99,10 @@ def keymap
     @key_actors[@keymap_label]
   end
 
+  def loaded?
+    @loaded
+  end
+
   def inputrc_path
     case ENV['INPUTRC']
     when nil, ''
@@ -219,6 +224,7 @@ def read_lines(lines, file = nil)
     unless if_stack.empty?
       raise InvalidInputrc, "#{file}:#{if_stack.last[0]}: unclosed if"
     end
+    @loaded = true
   end
 
   def handle_directive(directive, file, no, if_stack)