diff --git a/src/Data/MetricData.php b/src/Data/MetricData.php
new file mode 100644
index 0000000..5ea0c46
--- /dev/null
+++ b/src/Data/MetricData.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DragonCode\Benchmark\Data;
+
+readonly class MetricData
+{
+    public function __construct(
+        public float $time,
+        public float $memory,
+    ) {}
+}
diff --git a/src/Data/ResultData.php b/src/Data/ResultData.php
new file mode 100644
index 0000000..f57fd58
--- /dev/null
+++ b/src/Data/ResultData.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DragonCode\Benchmark\Data;
+
+readonly class ResultData
+{
+    public function __construct(
+        public MetricData $min,
+        public MetricData $max,
+        public MetricData $avg,
+        public MetricData $total,
+    ) {}
+}