From ad3fe7fc7d0b26a07e6a661978e6dd52e22a4424 Mon Sep 17 00:00:00 2001
From: hurali97 <hurali97@gmail.com>
Date: Mon, 2 Sep 2024 17:31:11 +0500
Subject: [PATCH] perf: add patch for date-fns-tz which reduces the execution
 time of getDateTimeFormat by ~84%

---
 patches/date-fns-tz+2.0.0.patch | 84 +++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 patches/date-fns-tz+2.0.0.patch

diff --git a/patches/date-fns-tz+2.0.0.patch b/patches/date-fns-tz+2.0.0.patch
new file mode 100644
index 000000000000..aa88f1443a79
--- /dev/null
+++ b/patches/date-fns-tz+2.0.0.patch
@@ -0,0 +1,84 @@
+diff --git a/node_modules/date-fns-tz/_lib/tzTokenizeDate/index.js b/node_modules/date-fns-tz/_lib/tzTokenizeDate/index.js
+index 9222a61..8540224 100644
+--- a/node_modules/date-fns-tz/_lib/tzTokenizeDate/index.js
++++ b/node_modules/date-fns-tz/_lib/tzTokenizeDate/index.js
+@@ -59,20 +59,23 @@ function hackyOffset(dtf, date) {
+ 
+ var dtfCache = {};
+ 
++// New browsers use `hourCycle`, IE and Chrome <73 does not support it and uses `hour12`
++const testDateFormatted = new Intl.DateTimeFormat('en-US', {
++  hourCycle: 'h23',
++  timeZone: 'America/New_York',
++  year: 'numeric',
++  month: '2-digit',
++  day: '2-digit',
++  hour: '2-digit',
++  minute: '2-digit',
++  second: '2-digit',
++}).format(new Date('2014-06-25T04:00:00.123Z'))
++const hourCycleSupported =
++  testDateFormatted === '06/25/2014, 00:00:00' ||
++  testDateFormatted === '‎06‎/‎25‎/‎2014‎ ‎00‎:‎00‎:‎00'
++
+ function getDateTimeFormat(timeZone) {
+   if (!dtfCache[timeZone]) {
+-    // New browsers use `hourCycle`, IE and Chrome <73 does not support it and uses `hour12`
+-    var testDateFormatted = new Intl.DateTimeFormat('en-US', {
+-      hour12: false,
+-      timeZone: 'America/New_York',
+-      year: 'numeric',
+-      month: 'numeric',
+-      day: '2-digit',
+-      hour: '2-digit',
+-      minute: '2-digit',
+-      second: '2-digit'
+-    }).format(new Date('2014-06-25T04:00:00.123Z'));
+-    var hourCycleSupported = testDateFormatted === '06/25/2014, 00:00:00' || testDateFormatted === '‎06‎/‎25‎/‎2014‎ ‎00‎:‎00‎:‎00';
+     dtfCache[timeZone] = hourCycleSupported ? new Intl.DateTimeFormat('en-US', {
+       hour12: false,
+       timeZone: timeZone,
+diff --git a/node_modules/date-fns-tz/esm/_lib/tzTokenizeDate/index.js b/node_modules/date-fns-tz/esm/_lib/tzTokenizeDate/index.js
+index cc1d143..17333cc 100644
+--- a/node_modules/date-fns-tz/esm/_lib/tzTokenizeDate/index.js
++++ b/node_modules/date-fns-tz/esm/_lib/tzTokenizeDate/index.js
+@@ -48,23 +48,24 @@ function hackyOffset(dtf, date) {
+ // to get deterministic local date/time output according to the `en-US` locale which
+ // can be used to extract local time parts as necessary.
+ var dtfCache = {}
++
++// New browsers use `hourCycle`, IE and Chrome <73 does not support it and uses `hour12`
++const testDateFormatted = new Intl.DateTimeFormat('en-US', {
++  hourCycle: 'h23',
++  timeZone: 'America/New_York',
++  year: 'numeric',
++  month: '2-digit',
++  day: '2-digit',
++  hour: '2-digit',
++  minute: '2-digit',
++  second: '2-digit',
++}).format(new Date('2014-06-25T04:00:00.123Z'))
++const hourCycleSupported =
++  testDateFormatted === '06/25/2014, 00:00:00' ||
++  testDateFormatted === '‎06‎/‎25‎/‎2014‎ ‎00‎:‎00‎:‎00'
++
+ function getDateTimeFormat(timeZone) {
+   if (!dtfCache[timeZone]) {
+-    // New browsers use `hourCycle`, IE and Chrome <73 does not support it and uses `hour12`
+-    var testDateFormatted = new Intl.DateTimeFormat('en-US', {
+-      hour12: false,
+-      timeZone: 'America/New_York',
+-      year: 'numeric',
+-      month: 'numeric',
+-      day: '2-digit',
+-      hour: '2-digit',
+-      minute: '2-digit',
+-      second: '2-digit',
+-    }).format(new Date('2014-06-25T04:00:00.123Z'))
+-    var hourCycleSupported =
+-      testDateFormatted === '06/25/2014, 00:00:00' ||
+-      testDateFormatted === '‎06‎/‎25‎/‎2014‎ ‎00‎:‎00‎:‎00'
+-
+     dtfCache[timeZone] = hourCycleSupported
+       ? new Intl.DateTimeFormat('en-US', {
+           hour12: false,