[6.x] Work the pattern for a like where out once

src/Query/Builder.php

@@ -42,6 +42,7 @@ abstract class Builder implements Contract
         '>=' => 'GreaterThanOrEqualTo',
         '<=' => 'LessThanOrEqualTo',
     ];
+    protected $likePatterns = [];
 
     public function __call($method, $args)
     {
@@ -816,7 +817,10 @@ protected function filterTestLike($item, $like)
             $item = json_encode($item);
         }
 
-        $pattern = Pattern::sqlLikeToRegex($like);
+        // What's being looked for is the same for every item, so its pattern is only worked out for the first.
+        $pattern = is_string($like)
+            ? $this->likePatterns[$like] ??= Pattern::sqlLikeToRegex($like)
+            : Pattern::sqlLikeToRegex($like);
 
         return preg_match('/'.$pattern.'/imu', (string) $item);
     }

tests/Data/Entries/EntryQueryBuilderTest.php

@@ -1755,6 +1755,30 @@ public function a_query_builder_with_its_own_idea_of_equal_gets_to_use_it()
 
         $this->assertEquals(['b'], $query->where('thing', 'red')->get()->map->id()->all());
     }
+
+    #[Test]
+    public function the_pattern_for_a_like_is_worked_out_once_for_all_the_entries_it_is_tested_against()
+    {
+        $this->createDummyCollectionAndEntries();
+
+        \Statamic\Facades\Pattern::partialMock()->shouldReceive('sqlLikeToRegex')->with('%post 1%')->once()->passthru();
+
+        $this->assertEquals(['Post 1'], Entry::query()->where('title', 'like', '%post 1%')->get()->map->title->all());
+    }
+
+    #[Test]
+    public function each_like_in_a_query_looks_for_its_own_thing()
+    {
+        $this->createDummyCollectionAndEntries();
+
+        $entries = Entry::query()
+            ->where('title', 'like', 'post%')
+            ->where('title', 'not like', '%2')
+            ->where(fn ($query) => $query->where('title', 'like', '%1')->orWhere('title', 'like', '%3'))
+            ->get();
+
+        $this->assertEquals(['Post 1', 'Post 3'], $entries->map->title->all());
+    }
 }
 
 class CaseSensitiveEntryQueryBuilder extends \Statamic\Stache\Query\EntryQueryBuilder