While working on my Lambda function in Node.js, I noticed a significant difference in the time measured from the start to the end of the function compared to the billed duration provided by Lambda. The function itself takes around 1400 milliseconds to execute, but Lambda reports 2800 milliseconds as the duration.
Is this discrepancy normal? What could be causing this issue where the billed duration is double the actual execution time?
Below is the code snippet that I used to measure the execution time:
exports.handler = function(event, context, callback) {
let time = new Date();
... some logic runs ...
console.log(`{new Date().getTime() - time.getTime()}`);
callback(null, response);
}