Update performance.md

Author: rtheunissen

_includes/performance.md

@@ -16,8 +16,8 @@ Results are the total runtime to produce a result across many iterations, in sec
 |-------------------------+------------+--------------+--------------+--------------+--------------|
 |                         |  Type      | Add          | Subtract     | Multiply     | Divide       |
 |:------------------------|:-----------|-------------:|-------------:|-------------:|-------------:|
-| `bcmath`                | `string`   | `3.552`      | `3.662`      | `6.7272`    | `25.8195`     |
-| `Decimal`               | `string`   | `2.5652`     | `2.6048`     | `2.5794`    | `5.3271`      |
+| `bcmath`                | `string`   | `3.5520`     | `3.6620`     | `6.7272`    | `25.8195`     |
+| `php-decimal`           | `string`   | **`2.5652`** | **`2.6048`** | **`2.5794`**| **`5.32710`** |
 | `bcmath`                | `int`      | `4.2136`     | `4.2002`     | `5.5506`    | `11.5603`     |
-| `Decimal`               | `int`      | `1.6846`     | `1.6523`     | `1.7213`    | `4.778`       |
+| `php-decimal`           | `int`      | **`1.6846`** | **`1.6523`** | **`1.7213`**| **`4.7780`**  |
 |-------------------------+------------+--------------+--------------+--------------+--------------|