diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff3d3363b..63c341b13 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## 2.0.1 under development
 
-- no changes in this release.
+- Enh #477: Improve performance of `ArrayParser::parse()` method (@Tigrov)
 
 ## 2.0.0 December 05, 2025
 
diff --git a/src/Data/ArrayParser.php b/src/Data/ArrayParser.php
index bc3b77235..1866ec0c1 100644
--- a/src/Data/ArrayParser.php
+++ b/src/Data/ArrayParser.php
@@ -4,7 +4,11 @@
 
 namespace Yiisoft\Db\Pgsql\Data;
 
-use function in_array;
+use function preg_match;
+use function strcspn;
+use function stripcslashes;
+use function strlen;
+use function substr;
 
 /**
  * Array representation to PHP array parser for PostgreSQL Server.
@@ -64,16 +68,10 @@ private function parseArray(string $value, int &$i = 0): array
      */
     private function parseQuotedString(string $value, int &$i): string
     {
-        for ($result = '', ++$i;; ++$i) {
-            if ($value[$i] === '\\') {
-                ++$i;
-            } elseif ($value[$i] === '"') {
-                ++$i;
-                return $result;
-            }
+        preg_match('/(?>[^"\\\\]+|\\\\.)*/', $value, $matches, 0, $i + 1);
+        $i += strlen($matches[0]) + 2;
 
-            $result .= $value[$i];
-        }
+        return stripcslashes($matches[0]);
     }
 
     /**
@@ -81,14 +79,10 @@ private function parseQuotedString(string $value, int &$i): string
      */
     private function parseUnquotedString(string $value, int &$i): ?string
     {
-        for ($result = '';; ++$i) {
-            if (in_array($value[$i], [',', '}'], true)) {
-                return $result !== 'NULL'
-                    ? $result
-                    : null;
-            }
+        $length = strcspn($value, ',}', $i);
+        $result = substr($value, $i, $length);
+        $i += $length;
 
-            $result .= $value[$i];
-        }
+        return $result !== 'NULL' ? $result : null;
     }
 }
diff --git a/tests/ArrayParserTest.php b/tests/ArrayParserTest.php
index 5737616c5..ac19ae5fa 100644
--- a/tests/ArrayParserTest.php
+++ b/tests/ArrayParserTest.php
@@ -4,33 +4,58 @@
 
 namespace Yiisoft\Db\Pgsql\Tests;
 
+use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 use Yiisoft\Db\Pgsql\Data\ArrayParser;
 
 /**
  * @group pgsql
- *
- * @psalm-suppress PropertyNotSetInConstructor
  */
 final class ArrayParserTest extends TestCase
 {
-    public function testParser(): void
+    public static function parserProvider(): iterable
     {
-        $arrayParse = new ArrayParser();
-
-        $this->assertSame([0 => null, 1 => null], $arrayParse->parse('{NULL,NULL}'));
-        $this->assertSame([], $arrayParse->parse('{}'));
-        $this->assertSame([0 => null, 1 => null], $arrayParse->parse('{,}'));
-        $this->assertSame([0 => '1', 1 => '2', 2 => '3'], $arrayParse->parse('{1,2,3}'));
-        $this->assertSame([0 => '1', 1 => '-2', 2 => null, 3 => '42'], $arrayParse->parse('{1,-2,NULL,42}'));
-        $this->assertSame([[0 => 'text'], [0 => null], [0 => '1']], $arrayParse->parse('{{text},{NULL},{1}}'));
-        $this->assertSame([0 => ''], $arrayParse->parse('{""}'));
-        $this->assertSame(
-            [0 => '[",","null",true,"false","f"]'],
-            $arrayParse->parse('{"[\",\",\"null\",true,\"false\",\"f\"]"}'),
-        );
-
+        yield [[], '{}'];
+        yield [[''], '{""}'];
+        yield [[null, null], '{NULL,NULL}'];
+        yield [[null, null], '{,}'];
+        yield [
+            ["a\nb"],
+            "{\"a\nb\"}",
+        ];
+        yield [
+            ['1', '2', '3'],
+            '{1,2,3}',
+        ];
+        yield [
+            ['1', '-2', null, '42'],
+            '{1,-2,NULL,42}',
+        ];
+        yield [
+            [['text'], [null], ['1']],
+            '{{text},{NULL},{1}}',
+        ];
+        yield [
+            [',', '}', '"', '\\', '"\\,}', 'NULL', 't', 'f'],
+            '{",","}","\\"","\\\\","\\"\\\\,}","NULL",t,f}',
+        ];
+        yield [
+            ['[",","null",true,"false","f"]'],
+            '{"[\",\",\"null\",true,\"false\",\"f\"]"}',
+        ];
+        // Multibyte strings
+        yield [
+            ['我', '👍🏻', 'multibyte строка我👍🏻', 'נטשופ צרכנות'],
+            '{我,👍🏻,"multibyte строка我👍🏻","נטשופ צרכנות"}',
+        ];
         // Similar cases can be in default values
-        $this->assertSame(null, $arrayParse->parse("'{one,two}'::text[]"));
+        yield [null, "'{one,two}'::text[]"];
+    }
+
+    #[DataProvider('parserProvider')]
+    public function testParser(?array $expected, string $value): void
+    {
+        $arrayParse = new ArrayParser();
+        $this->assertSame($expected, $arrayParse->parse($value));
     }
 }