diff --git a/README.md b/README.md
index 8676fa8..5d7a27f 100644
--- a/README.md
+++ b/README.md
@@ -16,11 +16,9 @@ Use your favourite plugin manager to install.
 
 ```lua
 -- init.lua
-require("packer").startup(
-    function()
-        use "lukas-reineke/cmp-rg"
-    end
-)
+require("packer").startup(function()
+    use "lukas-reineke/cmp-rg"
+end)
 ```
 
 #### Example with Plug
@@ -39,10 +37,14 @@ call plug#end()
 Add `rg` to your cmp sources
 
 ```lua
-require'cmp'.setup {
+require("cmp").setup {
     sources = {
-        { name = 'rg' }
-    }
+        {
+            name = "rg",
+            -- Try it when you feel cmp performance is poor
+            -- keyword_length = 3
+        },
+    },
 }
 ```
 
diff --git a/doc/cmp-rg.txt b/doc/cmp-rg.txt
index 6f45ad4..a38b994 100644
--- a/doc/cmp-rg.txt
+++ b/doc/cmp-rg.txt
@@ -2,7 +2,7 @@
 
 
 Author: Lukas Reineke <lukas.reineke@protonmail.com>
-Version: 1.3.7
+Version: 1.3.8
 
 ==============================================================================
 CONTENTS                                                              *cmp-rg*
@@ -104,10 +104,14 @@ debug                                                           *cmp-rg-debug*
 
     Add `rg` to your cmp sources
     >
-        require'cmp'.setup {
+        require("cmp").setup {
             sources = {
-                { name = 'rg' }
-            }
+                {
+                    name = "rg",
+                    -- Try it when you feel cmp performance is poor
+                    -- keyword_length = 3
+                },
+            },
         }
 
 ==============================================================================
diff --git a/lua/cmp-rg/init.lua b/lua/cmp-rg/init.lua
index 5f58c23..c2979d9 100644
--- a/lua/cmp-rg/init.lua
+++ b/lua/cmp-rg/init.lua
@@ -7,9 +7,18 @@ require "cmp-rg.types"
 local source = {}
 
 source.new = function()
+    local timer = vim.loop.new_timer()
+    vim.api.nvim_create_autocmd("VimLeavePre", {
+        callback = function()
+            if timer and not timer:is_closing() then
+                timer:stop()
+                timer:close()
+            end
+        end,
+    })
     return setmetatable({
         running_job_id = 0,
-        timer = vim.loop.new_timer(),
+        timer = timer,
         json_decode = vim.fn.has "nvim-0.6" == 1 and vim.json.decode or vim.fn.json_decode,
     }, { __index = source })
 end
@@ -26,6 +35,7 @@ source.complete = function(self, request, callback)
     end
     local seen = {}
     local items = {}
+    local chunk_size = 5
 
     local function on_event(_, data, event)
         if event == "stdout" then
@@ -111,7 +121,10 @@ source.complete = function(self, request, callback)
                     end
                 end
             end
-            callback { items = items, isIncomplete = true }
+            if #items - chunk_size >= chunk_size then
+                chunk_size = chunk_size * 2
+                callback { items = items, isIncomplete = true }
+            end
         end
 
         if event == "stderr" and request.option.debug then