gistfile1.txt

diff --git a/lib/uri/common.rb b/lib/uri/common.rb
index 90e6559..e2d7ff8 100644
--- a/lib/uri/common.rb
+++ b/lib/uri/common.rb
@@ -849,6 +849,15 @@ module URI
   end
 
   TBLENCWWWCOMP_ = {} # :nodoc:
+
+  tbl = TBLENCWWWCOMP_
+  if tbl.empty?
+    256.times do |i|
+      tbl[i.chr] = '%%%02X' % i
+    end
+    tbl[' '] = '+'
+  end
+
   TBLDECWWWCOMP_ = {} # :nodoc:
   HTML5ASCIIINCOMPAT = [Encoding::UTF_7, Encoding::UTF_16BE, Encoding::UTF_16LE,
     Encoding::UTF_32BE, Encoding::UTF_32LE] # :nodoc:
@@ -863,18 +872,6 @@ module URI
   #
   # See URI.decode_www_form_component, URI.encode_www_form
   def self.encode_www_form_component(str)
-    if TBLENCWWWCOMP_.empty?
-      tbl = {}
-      256.times do |i|
-        tbl[i.chr] = '%%%02X' % i
-      end
-      tbl[' '] = '+'
-      begin
-        TBLENCWWWCOMP_.replace(tbl)
-        TBLENCWWWCOMP_.freeze
-      rescue
-      end
-    end
     str = str.to_s
     if HTML5ASCIIINCOMPAT.include?(str.encoding)
       str = str.encode(Encoding::UTF_8)