diff --git a/lua/cmp/core.lua b/lua/cmp/core.lua
index 746a397..02b75ac 100644
--- a/lua/cmp/core.lua
+++ b/lua/cmp/core.lua
@@ -260,57 +260,45 @@ core.complete = function(self, ctx)
 end
 
 ---Update completion menu
-core.filter = async.throttle(
-  setmetatable({
-    ctx = nil,
-  }, {
-    __call = function(this, self)
-      self.filter.timeout = self.view:visible() and THROTTLE_TIME or 0
+core.filter = async.throttle(function(self)
+  self.filter.timeout = self.view:visible() and THROTTLE_TIME or 0
 
-      -- Check context changed.
-      local ctx = self:get_context()
-      if this.ctx and not this.ctx:changed(ctx) then
-        return
-      end
-      this.ctx = ctx
-
-      -- Check invalid condition.
-      local ignore = false
-      ignore = ignore or not api.is_suitable_mode()
-      if ignore then
-        return
-      end
-
-      -- Check fetching sources.
-      local sources = {}
-      for _, s in ipairs(self:get_sources({ source.SourceStatus.FETCHING, source.SourceStatus.COMPLETED })) do
-        if not s.incomplete and SOURCE_TIMEOUT > s:get_fetching_time() then
-          -- Reserve filter call for timeout.
-          self.filter.timeout = SOURCE_TIMEOUT - s:get_fetching_time()
-          self:filter()
-          break
-        end
-        table.insert(sources, s)
-      end
-
-      -- Display completion results.
-      self.view:open(ctx, sources)
-
-      -- Check onetime config.
-      if #self:get_sources(function(s)
-        if s.status == source.SourceStatus.FETCHING then
-          return true
-        elseif #s:get_entries(ctx) > 0 then
-          return true
-        end
-        return false
-      end) == 0 then
-      config.set_onetime({})
-    end
+  -- Check invalid condition.
+  local ignore = false
+  ignore = ignore or not api.is_suitable_mode()
+  if ignore then
+    return
   end
-  }),
-  THROTTLE_TIME
-)
+
+  -- Check fetching sources.
+  local sources = {}
+  for _, s in ipairs(self:get_sources({ source.SourceStatus.FETCHING, source.SourceStatus.COMPLETED })) do
+    if not s.incomplete and SOURCE_TIMEOUT > s:get_fetching_time() then
+      -- Reserve filter call for timeout.
+      self.filter.timeout = SOURCE_TIMEOUT - s:get_fetching_time()
+      self:filter()
+      break
+    end
+    table.insert(sources, s)
+  end
+
+  local ctx = self:get_context()
+
+  -- Display completion results.
+  self.view:open(ctx, sources)
+
+  -- Check onetime config.
+  if #self:get_sources(function(s)
+    if s.status == source.SourceStatus.FETCHING then
+      return true
+    elseif #s:get_entries(ctx) > 0 then
+      return true
+    end
+    return false
+  end) == 0 then
+    config.set_onetime({})
+  end
+end, THROTTLE_TIME)
 
 ---Confirm completion.
 ---@param e cmp.Entry
diff --git a/lua/cmp/utils/keymap_spec.lua b/lua/cmp/utils/keymap_spec.lua
index e9c19ab..896c5f4 100644
--- a/lua/cmp/utils/keymap_spec.lua
+++ b/lua/cmp/utils/keymap_spec.lua
@@ -94,6 +94,7 @@ describe('keymap', function()
 
   describe('realworld', function()
     before_each(spec.before)
+
     it('#226', function()
       keymap.listen('i', '<c-n>', function(_, fallback)
         fallback()
@@ -101,6 +102,7 @@ describe('keymap', function()
       vim.api.nvim_feedkeys(keymap.t('iaiueo<CR>a<C-n><C-n>'), 'tx', true)
       assert.are.same({ 'aiueo', 'aiueo' }, vim.api.nvim_buf_get_lines(0, 0, -1, true))
     end)
+
     it('#414', function()
       keymap.listen('i', '<M-j>', function()
         vim.api.nvim_feedkeys(keymap.t('<C-n>'), 'int', true)
@@ -108,5 +110,17 @@ describe('keymap', function()
       vim.api.nvim_feedkeys(keymap.t('iaiueo<CR>a<M-j><M-j>'), 'tx', true)
       assert.are.same({ 'aiueo', 'aiueo' }, vim.api.nvim_buf_get_lines(0, 0, -1, true))
     end)
+
+    -- it('#744', function()
+    --   vim.api.nvim_buf_set_keymap(0, 'i', '<C-r>', 'recursive', {
+    --     noremap = true
+    --   })
+    --   vim.api.nvim_buf_set_keymap(0, 'i', '<CR>', '<CR>recursive', {
+    --     noremap = false
+    --   })
+    --   keymap.listen('i', '<CR>', function(_, fallback) fallback() end)
+    --   feedkeys.call(keymap.t('i<CR>'), 'tx')
+    --   assert.are.same({ '', 'recursive' }, vim.api.nvim_buf_get_lines(0, 0, -1, true))
+    -- end)
   end)
 end)
diff --git a/lua/cmp/view.lua b/lua/cmp/view.lua
index 0eafcd2..e29e6f7 100644
--- a/lua/cmp/view.lua
+++ b/lua/cmp/view.lua
@@ -197,36 +197,33 @@ view._get_entries_view = function(self)
 end
 
 ---On entry change
-view.on_entry_change = async.throttle(
-  function(self)
-    if not self:visible() then
-      return
+view.on_entry_change = async.throttle(function(self)
+  if not self:visible() then
+    return
+  end
+  local e = self:get_selected_entry()
+  if e then
+    for _, c in ipairs(config.get().confirmation.get_commit_characters(e:get_commit_characters())) do
+      keymap.listen('i', c, function(...)
+        self.event:emit('keymap', ...)
+      end)
     end
-    local e = self:get_selected_entry()
-    if e then
-      for _, c in ipairs(config.get().confirmation.get_commit_characters(e:get_commit_characters())) do
-        keymap.listen('i', c, function(...)
-          self.event:emit('keymap', ...)
-        end)
+    e:resolve(vim.schedule_wrap(self.resolve_dedup(function()
+      if not self:visible() then
+        return
       end
-      e:resolve(vim.schedule_wrap(self.resolve_dedup(function()
-        if not self:visible() then
-          return
-        end
-        self.docs_view:open(e, self:_get_entries_view():info())
-      end)))
-    else
-      self.docs_view:close()
-    end
+      self.docs_view:open(e, self:_get_entries_view():info())
+    end)))
+  else
+    self.docs_view:close()
+  end
 
-    e = e or self:get_first_entry()
-    if e then
-      self.ghost_text_view:show(e)
-    else
-      self.ghost_text_view:hide()
-    end
-  end,
-  20
-)
+  e = e or self:get_first_entry()
+  if e then
+    self.ghost_text_view:show(e)
+  else
+    self.ghost_text_view:hide()
+  end
+end, 20)
 
 return view