Microseconds in XSJS

Hello,

i'm facing one problem. My client has this code in php

$start_time = microtime(true); // with this you get the current timestamp with microseconds

//code to meassure it's performance here...

...

$time = microtime(true) - $start_time;

So they want to meassure how long it takes to execute the code.

But a microseconds precission will be needed...

I've tried with Date(), CURRENT_TIMESTAMP and now(), but all i get is milliseconds precission...

Is there a way to implement the above code in XSJS??

Best regards,

Luis.