diff --git a/SQLInterface.md b/SQLInterface.md
index 0e92360a..1561f11e 100644
--- a/SQLInterface.md
+++ b/SQLInterface.md
@@ -136,11 +136,9 @@ Only [`NullByte`](https://pkg.go.dev/database/sql/#NullByte), [`NullBool`](https
 `database/sql`. Implementations of database-specific null types are left
 to the database driver. User types supporting `NULL` can be created by implementing interfaces [`database/sql/driver.Valuer`](https://pkg.go.dev/database/sql/driver/#Valuer) and [`database/sql.Scanner`](https://pkg.go.dev/database/sql/#Scanner).
 
-You can also pass pointer types.
+You can also pass pointer types. Be careful for performance issues as it requires extra memory allocations.
 
 ```go
 var name *string
 err := db.QueryRowContext(ctx, "SELECT name FROM names WHERE id = $1", id).Scan(&name)
-```
-
-NOTE: Scanning will result in extra heap allocation, regardless of whether you use a pointer or one of the `Null`-types. From the point of pure memory allocation, the two alternatives are analogous and differ only in their intended reader semantic.
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+```
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