Update the PageArrayIterator::$chunkSize setting to be configurable via $config->lazyPageChunkSize per @apeisa

wire/config.php

@@ -1129,6 +1129,14 @@ $config->allowExceptions = false;
  */
 $config->usePoweredBy = true;
 
+/**
+ * Chunk size for lazy-loaded pages used by $pages->findMany()
+ * 
+ * @var int
+ * 
+ */
+$config->lazyPageChunkSize = 250;
+
 /**
  * Settings specific to InputfieldWrapper class
  *

wire/core/Config.php

@@ -121,6 +121,7 @@
  * @property bool $allowExceptions Allow Exceptions to propagate? (default=false, specify true only if you implement your own exception handler) #pw-group-system
  * @property bool $usePoweredBy Use the x-powered-by header? Set to false to disable. #pw-group-system
  * @property bool $useFunctionsAPI Allow most API variables to be accessed as functions? (see /wire/core/FunctionsAPI.php) #pw-group-system
+ * @property int $lazyPageChunkSize Chunk size for for $pages->findMany() calls. #pw-group-system
  * 
  * @property string $userAuthSalt Salt generated at install time to be used as a secondary/non-database salt for the password system. #pw-group-session
  * @property string $userAuthHashType Default is 'sha1' - used only if Blowfish is not supported by the system. #pw-group-session

wire/core/PageArrayIterator.php

@@ -73,7 +73,7 @@ class PageArrayIterator extends Wire implements \Iterator {
 	 * @var int
 	 * 
 	 */ 
-	protected $chunkSize = 1000;
+	protected $chunkSize = 250;
 	
 	/**
 	 * Construct
@@ -92,7 +92,7 @@ class PageArrayIterator extends Wire implements \Iterator {
 	 * 
 	 */
 	protected function loadChunk() {
-		
+		$this->chunkSize = (int) $this->wire('config')->lazyPageChunkSize;
 		$this->pagesPosition = 0;
 		$start = $this->currentChunk++ * $this->chunkSize;