diff --git a/nomsu.lua b/nomsu.lua
index 44b2fb0..e24cdb5 100644
--- a/nomsu.lua
+++ b/nomsu.lua
@@ -1114,31 +1114,26 @@ end)]]):format(concat(lua_bits, "\n"))
         self:error("Nothing to get stub from")
       end
       if type(x) == 'string' then
-        local patt = re.compile("{|(' '+ / '\n..' / {'\\'? '%' %id*} / {%id+} / {%op})*|}", {
-          id = IDENT_CHAR,
-          op = OPERATOR_CHAR
-        })
-        local spec = concat(patt:match(x), " ")
+        local spec = concat(self.__class.stub_patt:match(x), " ")
         local stub = spec:gsub("%%%S+", "%%"):gsub("\\", "")
         local arg_names
         do
           local _accum_0 = { }
           local _len_0 = 1
-          for arg in spec:gmatch("%%([^%s]*)") do
+          for arg in spec:gmatch("%%(%S*)") do
             _accum_0[_len_0] = arg
             _len_0 = _len_0 + 1
           end
           arg_names = _accum_0
         end
-        local escaped_args = set((function()
-          local _accum_0 = { }
-          local _len_0 = 1
+        local escaped_args
+        do
+          local _tbl_0 = { }
           for arg in spec:gmatch("\\%%(%S*)") do
-            _accum_0[_len_0] = arg
-            _len_0 = _len_0 + 1
+            _tbl_0[arg] = true
           end
-          return _accum_0
-        end)())
+          escaped_args = _tbl_0
+        end
         return stub, arg_names, escaped_args
       end
       if type(x) ~= 'table' then
@@ -1421,6 +1416,10 @@ end)]]):format(concat(lua_bits, "\n"))
     insert(bits, close)
     return concat(bits)
   end
+  self.stub_patt = re.compile("{|(' '+ / '\n..' / {'\\'? '%' %id*} / {%id+} / {%op})*|}", {
+    id = IDENT_CHAR,
+    op = OPERATOR_CHAR
+  })
   NomsuCompiler = _class_0
 end
 if arg then
diff --git a/nomsu.moon b/nomsu.moon
index c7fac0d..896cd4b 100755
--- a/nomsu.moon
+++ b/nomsu.moon
@@ -748,6 +748,8 @@ end)]])\format(concat(lua_bits, "\n"))
                     tree = new_values
         return tree
 
+    @stub_patt: re.compile "{|(' '+ / '\n..' / {'\\'? '%' %id*} / {%id+} / {%op})*|}",
+        id:IDENT_CHAR, op:OPERATOR_CHAR
     get_stub: (x)=>
         if not x
             @error "Nothing to get stub from"
@@ -756,12 +758,10 @@ end)]])\format(concat(lua_bits, "\n"))
         --   (e.g. "say %msg") or function call (e.g. FunctionCall({Word("say"), Var("msg")))
         if type(x) == 'string'
             -- Standardize format to stuff separated by spaces
-            patt = re.compile "{|(' '+ / '\n..' / {'\\'? '%' %id*} / {%id+} / {%op})*|}",
-                id:IDENT_CHAR, op:OPERATOR_CHAR
-            spec = concat patt\match(x), " "
+            spec = concat @@stub_patt\match(x), " "
             stub = spec\gsub("%%%S+","%%")\gsub("\\","")
-            arg_names = [arg for arg in spec\gmatch("%%([^%s]*)")]
-            escaped_args = set [arg for arg in spec\gmatch("\\%%(%S*)")]
+            arg_names = [arg for arg in spec\gmatch("%%(%S*)")]
+            escaped_args = {arg, true for arg in spec\gmatch("\\%%(%S*)")}
             return stub, arg_names, escaped_args
         if type(x) != 'table'
             @error "Invalid type for getting stub: #{type(x)} for:\n#{repr x}"