benjaminblack/high-resolution-timers-in-node.md

## high-resolution-timers-in-node.md

      
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              high-resolution-timers-in-node.md
            
          
    function longrunning() {
    const timestamp = process.hrtime(); // returns high-resolution array pair: [seconds, nanoseconds]
    // ...
    // do something
    // ...
    const elapsed = (([sec, ns] = process.hrtime(timestamp)) => ((sec + (ns / 1e9)) * 1e3))(); // converts [seconds, nanoseconds] into milliseconds
}