Add microcaching around the score queries

src/dashboard/infrastructure/scores/readability-scores/readability-scores-collector.php

@@ -3,6 +3,7 @@
 // phpcs:disable Yoast.NamingConventions.NamespaceName.MaxExceeded
 namespace Yoast\WP\SEO\Dashboard\Infrastructure\Scores\Readability_Scores;
 
+use WPSEO_Utils;
 use Yoast\WP\Lib\Model;
 use Yoast\WP\SEO\Dashboard\Domain\Content_Types\Content_Type;
 use Yoast\WP\SEO\Dashboard\Domain\Scores\Readability_Scores\Readability_Scores_Interface;
@@ -13,6 +14,8 @@
  */
 class Readability_Scores_Collector implements Scores_Collector_Interface {
 
+	public const READABILITY_SCORES_TRANSIENT = 'wpseo_readability_scores';
+
 	/**
 	 * Retrieves the current readability scores for a content type.
 	 *
@@ -24,13 +27,22 @@ class Readability_Scores_Collector implements Scores_Collector_Interface {
 	 */
 	public function get_current_scores( array $readability_scores, Content_Type $content_type, ?int $term_id ) {
 		global $wpdb;
+
+		$content_type_name = $content_type->get_name();
+		$transient_name    = self::READABILITY_SCORES_TRANSIENT . '_' . $content_type_name . ( ( $term_id === null ) ? '' : '_' . $term_id );
+
+		$transient = \get_transient( $transient_name );
+		if ( $transient !== false ) {
+			return \json_decode( $transient, false );
+		}
+
 		$select = $this->build_select( $readability_scores );
 
 		$replacements = \array_merge(
 			\array_values( $select['replacements'] ),
 			[
 				Model::get_table_name( 'Indexable' ),
-				$content_type->get_name(),
+				$content_type_name,
 			]
 		);
 
@@ -51,6 +63,7 @@ public function get_current_scores( array $readability_scores, Content_Type $con
 				)
 			);
 			//phpcs:enable
+			\set_transient( $transient_name, WPSEO_Utils::format_json_encode( $current_scores ), ( \MINUTE_IN_SECONDS ) );
 			return $current_scores;
 
 		}
@@ -79,6 +92,7 @@ public function get_current_scores( array $readability_scores, Content_Type $con
 			)
 		);
 		//phpcs:enable
+		\set_transient( $transient_name, WPSEO_Utils::format_json_encode( $current_scores ), ( \MINUTE_IN_SECONDS ) );
 		return $current_scores;
 	}
 

src/dashboard/infrastructure/scores/seo-scores/seo-scores-collector.php

@@ -3,6 +3,7 @@
 // phpcs:disable Yoast.NamingConventions.NamespaceName.MaxExceeded
 namespace Yoast\WP\SEO\Dashboard\Infrastructure\Scores\SEO_Scores;
 
+use WPSEO_Utils;
 use Yoast\WP\Lib\Model;
 use Yoast\WP\SEO\Dashboard\Domain\Content_Types\Content_Type;
 use Yoast\WP\SEO\Dashboard\Domain\Scores\SEO_Scores\SEO_Scores_Interface;
@@ -13,6 +14,8 @@
  */
 class SEO_Scores_Collector implements Scores_Collector_Interface {
 
+	public const SEO_SCORES_TRANSIENT = 'wpseo_seo_scores';
+
 	/**
 	 * Retrieves the current SEO scores for a content type.
 	 *
@@ -24,13 +27,22 @@ class SEO_Scores_Collector implements Scores_Collector_Interface {
 	 */
 	public function get_current_scores( array $seo_scores, Content_Type $content_type, ?int $term_id ) {
 		global $wpdb;
+
+		$content_type_name = $content_type->get_name();
+		$transient_name    = self::SEO_SCORES_TRANSIENT . '_' . $content_type_name . ( ( $term_id === null ) ? '' : '_' . $term_id );
+
+		$transient = \get_transient( $transient_name );
+		if ( $transient !== false ) {
+			return \json_decode( $transient, false );
+		}
+
 		$select = $this->build_select( $seo_scores );
 
 		$replacements = \array_merge(
 			\array_values( $select['replacements'] ),
 			[
 				Model::get_table_name( 'Indexable' ),
-				$content_type->get_name(),
+				$content_type_name,
 			]
 		);
 
@@ -52,6 +64,7 @@ public function get_current_scores( array $seo_scores, Content_Type $content_typ
 				)
 			);
 			//phpcs:enable
+			\set_transient( $transient_name, WPSEO_Utils::format_json_encode( $current_scores ), ( \MINUTE_IN_SECONDS ) );
 			return $current_scores;
 
 		}
@@ -81,6 +94,7 @@ public function get_current_scores( array $seo_scores, Content_Type $content_typ
 			)
 		);
 		//phpcs:enable
+		\set_transient( $transient_name, WPSEO_Utils::format_json_encode( $current_scores ), ( \MINUTE_IN_SECONDS ) );
 		return $current_scores;
 	}