From 1803f20c42736246f401342f6f1b7f2f3b2affdb Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Sun, 20 Jul 2025 15:55:59 +0200
Subject: [PATCH 1/2] Avoid modulo operation in loop in array_chunk

For this benchmark:
```php
$length = 25;
for ($i=0;$i<1000;$i++)
  array_chunk(range(0, 10000), $length);
```

On an i7-4790, length=25 speeds up by 1.8x and length=1 by 1.27x.
On an i7-1185G7, length=25 speeds up by 1.08x and length=1 by 1.02x.
---
 ext/standard/array.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ext/standard/array.c b/ext/standard/array.c
index 522e7f715acb7..6de78c3900a93 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -7046,9 +7046,10 @@ PHP_FUNCTION(array_chunk)
 
 		/* If reached the chunk size, add it to the result array, and reset the
 		 * pointer. */
-		if (!(++current % size)) {
+		if (++current == size) {
 			add_next_index_zval(return_value, &chunk);
 			ZVAL_UNDEF(&chunk);
+			current = 0;
 		}
 	} ZEND_HASH_FOREACH_END();
 

From 3931badc0b9b40d3d4e25595f5cd9c2ab7566b0f Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Sun, 20 Jul 2025 16:26:42 +0200
Subject: [PATCH 2/2] Allocate array eagerly in array_chunk

By preallocating it as a packed array, we save the initial
initialization overhead.
Gives a few extra percentage points improvement.
---
 ext/standard/array.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ext/standard/array.c b/ext/standard/array.c
index 6de78c3900a93..5f2e34fdd545e 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -7023,6 +7023,7 @@ PHP_FUNCTION(array_chunk)
 	}
 
 	array_init_size(return_value, (uint32_t)(((num_in - 1) / size) + 1));
+	zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
 
 	ZVAL_UNDEF(&chunk);