how to use process.hrtime to get execution time of async function

Question

how to use process.hrtime to get execution time of async function

I am triing to get execution time of async function. Seemingly I can use process.hrtime for this. I created simple example:

console.log("starting");
var start = process.hrtime();
console.log("start");
console.log(start);

setTimeout(function(){
    console.log("HELLO");
    var end = process.hrtime();
    console.log("end");
    console.log(end);
}, 1000);

It outputs

starting
start
[ 131806, 731009597 ]
HELLO
end
[ 131807, 738212296 ]

But I don't understand where is exectuion time in miliseconds? I expect to get 1000 ms in this example.

node.js

Answer 1

Got it:

console.log("starting");
var start = process.hrtime();
console.log("start");
console.log(start);

setTimeout(function(){
    console.log("HELLO");
    var end = process.hrtime(start);
    console.log("end");
    console.log(end);
}, 1000);

Prints

starting
start
[ 132798, 207101051 ]
HELLO
end
[ 1, 7001730 ]

That means 1 second and 7001730 nanoseconds from start to end