Java 8 DateTimeFormatter performance

I have below code which is predominantly the most expensive in terms of time complexity in my application.

public class Test {

    private static final DateTimeFormatter SQL_FORMATTER = DateTimeFormatter.ofPattern("MM/dd/yy HH:mm:ss");

    public static void main(String[] args) {

        Instant start = Instant.now();
        try {

            String parsedDate = parseISO8601UtcDateToSqlDateFormat("2000-01-01T00:00:00Z");
            System.out.println(parsedDate);
        } finally {
            long timeTaken = Duration.between(start, Instant.now()).toMillis();
            System.out.println("\n\nFinished processing in: "+timeTaken+ " ms!\n"); 
        }
    }

    public static String parseISO8601UtcDateToSqlDateFormat(String param) {


        TemporalAccessor accessor = DateTimeFormatter.ISO_INSTANT.parse(param);
        LocalDateTime dateTime = LocalDateTime.ofInstant(Instant.from(accessor), ZoneOffset.UTC);
        return dateTime.format(SQL_FORMATTER);

    }

}

Date time formatting is consuming 16ms at the minimum.

Whereas my complete application which does a lot of complex processing is done in less than 1ms.

P.S: Question is not related to benchmarking, I just want to understand whether date time parsing with java 8 is really this expensive or am I doing something wrong.