Add clock api (#3595)

autoload/SpaceVim/api/clock.vim

@@ -0,0 +1,34 @@
+"=============================================================================
+" clock.vim --- clock API
+" Copyright (c) 2016-2019 Wang Shidong & Contributors
+" Author: Wang Shidong < wsdjeg@outlook.com >
+" URL: https://spacevim.org
+" License: GPLv3
+"=============================================================================
+let s:self = {}
+let s:self.__begin = 0
+let s:self.__long = 0
+
+function! s:self.start() abort
+  let self.__begin = reltime()
+  let self.__long = 0
+endfunction
+
+function! s:self.pause() abort
+  let self.__long = reltimefloat(reltime(self.__begin))
+endfunction
+
+function! s:self.continue() abort
+  let self.__begin = reltime()
+endfunction
+
+function! s:self.end() abort
+  let self.__end = reltimefloat(reltime(self.__begin))
+  return self.__end + self.__long
+endfunction
+
+
+function! SpaceVim#api#clock#get() abort
+  return deepcopy(s:self)
+endfunction
+