Measure API response time with fetch in node.js

Question

One of the functions in my node.js app is calling an external API using the fetch function. I am trying to find the most accurate way to measure the response time for the said API.

i am using the "Date" method to do it:

     let start_time = new Date().getTime();
      fetch('https://jsonplaceholder.typicode.com/posts/1')
  .then((res) => {
    return res.json();
  })
.then((data) => {
  console.log('Response time:', new Date().getTime() - start_time);

Is there a better\more accurate way to do it with fetch?

You can refer [link](https://stackoverflow.com/questions/313893/how-to-measure-time-taken-by-a-function-to-execute) — Shivaji Mutkule, Apr 20 '20 at 13:14

score 6 · Answer 1 · answered Apr 20 '20 at 12:22

You can use console.time & console.timeEnd as:

    console.time("timer1");
      fetch('https://jsonplaceholder.typicode.com/posts/1')
  .then((res) => {
    return res.json();
  })
.then((data) => {
  console.timeEnd("timer1");

It will print the time elapsed like

timer1: 0.105ms

score 2 · Answer 2 · answered Feb 02 '23 at 09:30

2

In case you want to get the number as variable but not printing it out

    const start = Date.now();
    const response = await fetch(url);
    const secSpent = (Date.now() - start) / 1000; // <---

answered Feb 02 '23 at 09:30

tom10271

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Measure API response time with fetch in node.js

2 Answers2