File 2835-Optimize-timestamps.patch of Package erlang

From 9596536f49e906a7bb13c0dc36a61ad791d5d158 Mon Sep 17 00:00:00 2001
From: Raimo Niskanen <raimo@erlang.org>
Date: Sun, 16 Feb 2020 00:23:08 +0100
Subject: [PATCH 5/6] Optimize timestamps

Using simply monotonic time and setting a calculated start time
should be more efficient since taking a timestamp only calls
one time BIF instead of 3.
---
 lib/kernel/src/inet_db.erl | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/kernel/src/inet_db.erl b/lib/kernel/src/inet_db.erl
index 33b10f54a2..491cb9c8d0 100644
--- a/lib/kernel/src/inet_db.erl
+++ b/lib/kernel/src/inet_db.erl
@@ -1184,7 +1184,7 @@ handle_set_file(
 	    File = filename:flatten(Fname),
 	    ets:insert(Db, {res_optname(Option), File}),
 	    ets:insert(Db, {TagInfo, undefined}),
-	    TimeZero = - (?RES_FILE_UPDATE_TM + 1), % Early enough
+	    TimeZero = times() - (?RES_FILE_UPDATE_TM + 1), % Early enough
 	    ets:insert(Db, {TagTm, TimeZero}),
 	    {reply,ok,State};
 	true ->
@@ -1554,8 +1554,9 @@ cache_rr(_Db, Cache, RR) ->
     ets:insert(Cache, RR).
 
 times() ->
-    erlang:convert_time_unit(erlang:monotonic_time() - erlang:system_info(start_time),
-			     native, second).
+    erlang:monotonic_time(second).
+    %% erlang:convert_time_unit(erlang:monotonic_time() - erlang:system_info(start_time),
+    %%     		     native, second).
 
 %% lookup and remove old entries
 
-- 
2.16.4