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From f03c6a870820543901331d1920b7b3e423813d2c Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
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Date: Thu, 27 Feb 2020 13:46:44 -0800
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Subject: [PATCH 1/6] environment: reduce calls to g_time_zone_new_local()
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Creating a new GTimeZone for the local timezone can be quite expensive if
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done repeatedly. It requires an open(), mmap(), and parsing of
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/etc/localtime.
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This patch was provided by Florian, and I've tested it as far back as
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3.28.4 to ensure that we are really reducing the number of open() calls
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on the compositor thread.
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https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/1051
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Signed-off-by: Christian Hergert <chergert@redhat.com>
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---
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js/ui/environment.js | 22 +++++++++++++++++++++-
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1 file changed, 21 insertions(+), 1 deletion(-)
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diff --git a/js/ui/environment.js b/js/ui/environment.js
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index e22ec7402..f3f2d17c7 100644
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--- a/js/ui/environment.js
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+++ b/js/ui/environment.js
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@@ -11,6 +11,9 @@ imports.gi.versions.TelepathyLogger = '0.2';
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const { Clutter, GLib, Shell, St } = imports.gi;
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const Gettext = imports.gettext;
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+const System = imports.system;
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+
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+let _localTimeZone = null;
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// We can't import shell JS modules yet, because they may have
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// variable initializations, etc, that depend on init() already having
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@@ -110,9 +113,26 @@ function init() {
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}
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};
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+ // Override to clear our own timezone cache as well
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+ const origClearDateCaches = System.clearDateCaches;
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+ System.clearDateCaches = function () {
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+ _localTimeZone = null;
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+ origClearDateCaches();
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+ };
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+
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// Work around https://bugzilla.mozilla.org/show_bug.cgi?id=508783
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Date.prototype.toLocaleFormat = function(format) {
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- return Shell.util_format_date(format, this.getTime());
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+ if (_localTimeZone === null)
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+ _localTimeZone = GLib.TimeZone.new_local();
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+
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+ let dt = GLib.DateTime.new(_localTimeZone,
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+ this.getYear(),
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+ this.getMonth() + 1,
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+ this.getDate(),
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+ this.getHours(),
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+ this.getMinutes(),
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+ this.getSeconds());
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+ return dt ? dt.format(format) : '';
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};
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let slowdownEnv = GLib.getenv('GNOME_SHELL_SLOWDOWN_FACTOR');
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--
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2.26.2
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