File 1190-prim_file-read_file_info-2-avoid-copying-t... of Package erlang

Overview Repositories Revisions Requests Users Attributes Meta

File 1190-prim_file-read_file_info-2-avoid-copying-the-record-.patch of Package erlang (Revision 2c13fe5010c2373357f7eed932e78181)

Currently displaying revision 2c13fe5010c2373357f7eed932e78181 , Show latest

From 5c07885c6b14f0017fd5b05f7caed529a0eb83aa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Muska=C5=82a?= <micmus@fb.com>
Date: Thu, 19 Jan 2023 13:03:03 +0000
Subject: [PATCH] prim_file:read_file_info/2 avoid copying the record for posix
 time read

When requested time format is already posix, we don't need to adjust anything,
but the old code would still copy the #file_info record, we can skip
the adjustments a function earlier and avoid this copy.

Before `prim_file:read_file_info("mix.exs", [raw, {time, posix}])`
would allocate 432 bytes, now it only allocates 312 bytes.
---
 erts/preloaded/src/prim_file.erl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/erts/preloaded/src/prim_file.erl b/erts/preloaded/src/prim_file.erl
index 3538b4fbba..29daf80229 100644
--- a/erts/preloaded/src/prim_file.erl
+++ b/erts/preloaded/src/prim_file.erl
@@ -653,6 +653,8 @@ read_handle_info_1(Fd, TimeType) ->
         error:_ -> {error, badarg}
     end.
 
+adjust_times(FileInfo, posix) ->
+    FileInfo;
 adjust_times(FileInfo, TimeType) ->
     CTime = from_posix_seconds(FileInfo#file_info.ctime, TimeType),
     MTime = from_posix_seconds(FileInfo#file_info.mtime, TimeType),
@@ -877,8 +879,6 @@ is_path_translatable(Path) ->
 %% We want to use posix time in all prim but erl_prim_loader makes that tricky
 %% It is probably needed to redo the whole erl_prim_loader
 
-from_posix_seconds(Seconds, posix) when is_integer(Seconds) ->
-    Seconds;
 from_posix_seconds(Seconds, universal) when is_integer(Seconds) ->
     erlang:posixtime_to_universaltime(Seconds);
 from_posix_seconds(Seconds, local) when is_integer(Seconds) ->
-- 
2.35.3

Places

File 1190-prim_file-read_file_info-2-avoid-copying-the-record-.patch of Package erlang (Revision 2c13fe5010c2373357f7eed932e78181)

Places