Calendar.getInstance.getTimeInMillis() Vs System.currentTimeMillis()

[kri shan]

Calendar.getInstance.getTimeInMillis() is similar to System.currentTimeMillis(). Both are giving long values. Which gives good performace than others. I am planning to use this for audit purpose.

[Rob Camick]

Most of use don't bother with micro optimization.

Why don't you create a simple program using each method in a loop and then report back on your findings.

[Henry Wong]

Under the covers, the Calendar classes uses the System.currentTimeMillis() method call to create a Calendar class with the current time. If all you want is the current time in millis, it's probably better to call the System class directly.

But I agree with Rob. This is unlikely to make any difference, and you should only optimize if you first confirm that its an issue first.

Henry