diff --git a/lua/cmp/core.lua b/lua/cmp/core.lua
index 2cff402..ceab8e0 100644
--- a/lua/cmp/core.lua
+++ b/lua/cmp/core.lua
@@ -72,6 +72,9 @@ end
 ---@type table<number, cmp.Source>
 core.sources = {}
 
+---@type table<string, cmp.Source[]>
+core.sources_by_name = {}
+
 ---@type cmp.Context
 core.context = context.new()
 
@@ -79,11 +82,20 @@ core.context = context.new()
 ---@param s cmp.Source
 core.register_source = function(s)
   core.sources[s.id] = s
+  if not core.sources_by_name[s.name] then
+    core.sources_by_name[s.name] = {}
+  end
+  table.insert(core.sources_by_name[s.name], s)
 end
 
 ---Unregister source
 ---@param source_id string
 core.unregister_source = function(source_id)
+  local name = core.sources[source_id].name
+  core.sources_by_name[name] = vim.tbl_filter(
+    function (source)
+      return source.id ~= source_id
+    end, core.sources_by_name[name])
   core.sources[source_id] = nil
 end
 
@@ -118,12 +130,10 @@ end
 core.get_sources = function(statuses)
   local sources = {}
   for _, c in pairs(config.get().sources) do
-    for _, s in pairs(core.sources) do
-      if c.name == s.name then
-        if not statuses or vim.tbl_contains(statuses, s.status) then
-          if s:is_available() then
-            table.insert(sources, s)
-          end
+    for _, s in ipairs(core.sources_by_name[c.name] or {}) do
+      if not statuses or vim.tbl_contains(statuses, s.status) then
+        if s:is_available() then
+          table.insert(sources, s)
         end
       end
     end