import Foundation

let sample = """
<?xml version="1.0" encoding="UTF-8"?>
<subscription>
<plan_code>monthly-test</plan_code>
<currency>USD</currency>
<account>
<account_code>241A52B6-CE23-4B6A-90B7-52710F3E6312</account_code>
<email>hello@test.nl</email>
<billing_info>
<token_id>O_zV7-8FNW6gYR0tXqrxjA</token_id>
</billing_info>
</account>
</subscription>
"""

let data = sample.data(using: .utf8)!

for _ in 0..<10_000 {
    guard let x: XMLElement = try XMLDocument(data: data, options: []).rootElement() else {
        fatalError()
    }
    print(x.children!.count)
}