pull changes from upstream: use hrtime instead of os.clock

lua/cmp/source.lua

@@ -129,7 +129,7 @@ source.get_entries = function(self, ctx)
   local entries = {}
   local matching_config = self:get_matching_config()
   local filtering_context_budget = config.get().performance.filtering_context_budget / 1000
-  local s = os.clock()
+  local stime = (vim.uv or vim.loop).hrtime() / 1000000
   for _, e in ipairs(target_entries) do
     local o = e.offset
     if not inputs[o] then
@@ -148,12 +148,13 @@ source.get_entries = function(self, ctx)
       end
     end
 
-    if os.clock() - s > filtering_context_budget then
+    local etime = (vim.uv or vim.loop).hrtime() / 1000000
+    if etime - stime > filtering_context_budget then
       async.yield()
       if ctx.aborted then
         async.abort()
       end
-      s = os.clock()
+      stime = etime
     end
   end