jdk8日期类性能测试

Instant start = Instant.now();
//code here
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = new Date();
System.out.println(sdf.format(date));
Instant finish = Instant.now();
long timeElapsed = Duration.between(start, finish).toMillis();
System.out.println(timeElapsed);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = new Date();
String s = sdf.format(date);

DateTimeFormatter format = DateTimeFormatter.ofPattern("yyyy-MM-dd");
LocalDate date = LocalDate.now();
String dateStr = date.format(format);

SimpleDateFormat sdf = new SimpleDateFormat("HHmmss");
Calendar cal = Calendar.getInstance();
int lCurrentTime = Integer.parseInt(sdf.format(cal.getTime()));

int time = Integer.parseInt(LocalTime.now().format(
        DateTimeFormatter.ofPattern("HHmmss")));

SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss.SSS");
Calendar cal = Calendar.getInstance();
String time = sdf.format(cal.getTime());

String time = LocalTime.now().toString();

DateFormat dateFormat = new SimpleDateFormat("yyyy");
Date lCreationDate = new Date();
String year = dateFormat.format(lCreationDate);

String year = String.valueOf(LocalDate.now().getYear());

GregorianCalendar gc = new GregorianCalendar();
int day = gc.get(GregorianCalendar.DAY_OF_YEAR);

int dayOfYear = LocalDate.now().getDayOfYear();

java.util.Date date= new java.util.Date();
String lFormatedTS = new SimpleDateFormat("yyyyMMddhhmmss").format(
        date.getTime());

String format = LocalDateTime.now().format(DateTimeFormatter.ofPattern(
        "yyyyMMddhhmmss"));