autoload/lsp/completion.vim | 34 ++++++++++++++++++----------------
 autoload/lsp/options.vim    |  2 ++
 doc/lsp.txt                 |  4 ++++

diff --git a/autoload/lsp/completion.vim b/autoload/lsp/completion.vim
index 77e24867f3644f9d5505d5fa0b22728624072cde..607d78d52e69fdcfc3155f3daa3330f05cd24357 100644
--- a/autoload/lsp/completion.vim
+++ b/autoload/lsp/completion.vim
@@ -172,22 +172,24 @@   if opt.lspOptions.ultisnipsSupport
     CompletionUltiSnips(prefix, items)
   endif
 
-  # add completion from current buf
-  var words = {}
-  var text = join(getline(1, '$'), "\n")
-  for word in split(text, '\W\+')
-      if !has_key(words, word) && len(word) > 1
-          words[word] = 1
-          items->add({
-              label: word,
-              data: {
-                  entryNames: [word],
-              },
-              kind: 26,
-              documentation: "",
-          })
-      endif
-  endfor
+  if opt.lspOptions.useBufferCompletion
+      # add completion from current buf
+      var words = {}
+      var text = join(getline(1, '$'), "\n")
+      for word in split(text, '\W\+')
+          if !has_key(words, word) && len(word) > 1
+              words[word] = 1
+              items->add({
+                  label: word,
+                  data: {
+                      entryNames: [word],
+                  },
+                  kind: 26,
+                  documentation: "",
+              })
+          endif
+      endfor
+  endif
 
   var completeItems: list<dict<any>> = []
   for item in items
diff --git a/autoload/lsp/options.vim b/autoload/lsp/options.vim
index ef708ee09dcc3cc2a57fd9d7bf72263498a23ae6..8e29c79e2ae39a0832b7ea49cac7359f601d8242 100644
--- a/autoload/lsp/options.vim
+++ b/autoload/lsp/options.vim
@@ -67,6 +67,8 @@   # Use a floating menu to show the code action menu instead of asking for input
   usePopupInCodeAction: false,
   # ShowReferences in a quickfix list instead of a location list`
   useQuickfixForLocations: false,
+  # add to autocomplition list current buffer words
+  useBufferCompletion: false,
   # Enable support for custom completion kinds
   customCompletionKinds: false,
   # A dictionary with all completion kinds that you want to customize
diff --git a/doc/lsp.txt b/doc/lsp.txt
index 5edad1cee1fd701a2989c049ba101fbf1d926250..ef60be1226c974b53e1fb20e442de7826826bb9a 100644
--- a/doc/lsp.txt
+++ b/doc/lsp.txt
@@ -498,6 +498,10 @@ usePopupInCodeAction    |Boolean| option.  When using the |:LspCodeAction|
 			command to display the code action for the current
 			line, use a popup menu instead of echoing.
 			By default this is set to false.
+						*lsp-opt-useBufferCompletion*
+useBufferCompletion     |Boolean| option. If enable adds current buffer words
+			to autocompletion list. Мay degrade vim performance.
+			By default this is set to false.
 
 For example, to disable the automatic placement of signs for the LSP
 diagnostic messages, you can add the following line to your .vimrc file: >