From d71dfdfc521c640736e41bf7943163c053939d47 Mon Sep 17 00:00:00 2001
From: Dan Krieger <dan@codingislife.com>
Date: Thu, 4 Aug 2022 10:03:51 -0700
Subject: [PATCH 1/3] Remove repeated calls to getCasts() in same method

---
 .../Database/Eloquent/Concerns/HasAttributes.php     | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
index d5f8225cf1bc..e26c77f1e239 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
@@ -1491,11 +1491,13 @@ protected function isEncryptedCastable($key)
      */
     protected function isClassCastable($key)
     {
-        if (! array_key_exists($key, $this->getCasts())) {
+        $casts = $this->getCasts();
+
+        if (! array_key_exists($key, $casts)) {
             return false;
         }
 
-        $castType = $this->parseCasterClass($this->getCasts()[$key]);
+        $castType = $this->parseCasterClass($casts[$key]);
 
         if (in_array($castType, static::$primitiveCastTypes)) {
             return false;
@@ -1516,11 +1518,13 @@ protected function isClassCastable($key)
      */
     protected function isEnumCastable($key)
     {
-        if (! array_key_exists($key, $this->getCasts())) {
+        $casts = $this->getCasts();
+
+        if (! array_key_exists($key, $casts)) {
             return false;
         }
 
-        $castType = $this->getCasts()[$key];
+        $castType = $casts[$key];
 
         if (in_array($castType, static::$primitiveCastTypes)) {
             return false;

From c156e136f77940766980f913b4885a4bf99f2633 Mon Sep 17 00:00:00 2001
From: Dan Krieger <dan@codingislife.com>
Date: Thu, 4 Aug 2022 10:04:07 -0700
Subject: [PATCH 2/3] Switch strncmp to starts_with_str

Marginally faster, better readability, and matches similar functions
---
 src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
index e26c77f1e239..0db8a0c2481e 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
@@ -882,8 +882,8 @@ protected function isCustomDateTimeCast($cast)
      */
     protected function isImmutableCustomDateTimeCast($cast)
     {
-        return strncmp($cast, 'immutable_date:', 15) === 0 ||
-               strncmp($cast, 'immutable_datetime:', 19) === 0;
+        return str_starts_with($cast, 'immutable_date:') ||
+                str_starts_with($cast, 'immutable_datetime:');
     }
 
     /**

From 424e8cfe7e36e3162d9a6b369cda38587f4b77cd Mon Sep 17 00:00:00 2001
From: Dan Krieger <dan@codingislife.com>
Date: Thu, 4 Aug 2022 10:26:55 -0700
Subject: [PATCH 3/3] Add castTypeCache

getCastType is called a lot when processing models with defined casts and contributes to a significant number of overall calls.  Caching the results of the key conversion can result in significant performance improvement when processing large numbers of models.
---
 .../Eloquent/Concerns/HasAttributes.php       | 27 +++++++++++++------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
index 0db8a0c2481e..557a36b90448 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
@@ -165,6 +165,13 @@ trait HasAttributes
      */
     protected static $setAttributeMutatorCache = [];
 
+    /**
+     * The cache of the converted cast types.
+     *
+     * @var array
+     */
+    protected static $castTypeCache = [];
+
     /**
      * The encrypter instance that is used to encrypt attributes.
      *
@@ -818,19 +825,23 @@ protected function getEnumCastableAttributeValue($key, $value)
      */
     protected function getCastType($key)
     {
-        if ($this->isCustomDateTimeCast($this->getCasts()[$key])) {
-            return 'custom_datetime';
-        }
+        $castType = $this->getCasts()[$key];
 
-        if ($this->isImmutableCustomDateTimeCast($this->getCasts()[$key])) {
-            return 'immutable_custom_datetime';
+        if (isset(static::$castTypeCache[$castType])) {
+            return static::$castTypeCache[$castType];
         }
 
-        if ($this->isDecimalCast($this->getCasts()[$key])) {
-            return 'decimal';
+        if ($this->isCustomDateTimeCast($castType)) {
+            $convertedCastType = 'custom_datetime';
+        } elseif ($this->isImmutableCustomDateTimeCast($castType)) {
+            $convertedCastType = 'immutable_custom_datetime';
+        } elseif ($this->isDecimalCast($castType)) {
+            $convertedCastType = 'decimal';
+        } else {
+            $convertedCastType = trim(strtolower($castType));
         }
 
-        return trim(strtolower($this->getCasts()[$key]));
+        return static::$castTypeCache[$castType] = $convertedCastType;
     }
 
     /**