Do not call type() repeatedly.

Author: Milly

autoload/vital/__vital__/Web/JSON.vim

@@ -80,15 +80,16 @@ function! s:encode(val, ...) abort
         \ 'indent': 0,
         \}, get(a:000, 0, {})
         \)
-  if type(a:val) == 0
+  let t = type(a:val)
+  if t == 0
     return a:val
-  elseif type(a:val) == 1
+  elseif t == 1
     let json = '"' . escape(a:val, '\"') . '"'
     let json = substitute(json, "\r", '\\r', 'g')
     let json = substitute(json, "\n", '\\n', 'g')
     let json = substitute(json, "\t", '\\t', 'g')
     return iconv(json, &encoding, 'utf-8')
-  elseif type(a:val) == 2
+  elseif t == 2
     if s:const.true == a:val
       return 'true'
     elseif s:const.false == a:val
@@ -99,9 +100,9 @@ function! s:encode(val, ...) abort
       " backward compatibility
       return string(a:val)
     endif
-  elseif type(a:val) == 3
+  elseif t == 3
     return s:_encode_list(a:val, settings)
-  elseif type(a:val) == 4
+  elseif t == 4
     return s:_encode_dict(a:val, settings)
   else
     return string(a:val)