Timings for HTTP requests
Inspired by the request
package.
NPM:
npm install @szmarczak/http-timer
Yarn:
yarn add @szmarczak/http-timer
Note:
- The measured events resemble Node.js events, not the kernel ones.
- Sending a chunk greater than
highWaterMark
will result in invalidupload
andresponse
timings. You can avoid this by splitting the payload into smaller chunks.
import https from 'https';
import timer from '@szmarczak/http-timer';
const request = https.get('https://httpbin.org/anything');
timer(request);
request.once('response', response => {
response.resume();
response.once('end', () => {
console.log(response.timings); // You can use `request.timings` as well
});
});
// {
// start: 1572712180361,
// socket: 1572712180362,
// lookup: 1572712180415,
// connect: 1572712180571,
// upload: 1572712180884,
// response: 1572712181037,
// end: 1572712181039,
// error: undefined,
// abort: undefined,
// phases: {
// wait: 1,
// dns: 53,
// tcp: 156,
// request: 313,
// firstByte: 153,
// download: 2,
// total: 678
// }
// }
Returns: Object
Note: The time is a number
representing the milliseconds elapsed since the UNIX epoch.
-
start
- Time when the request started. -
socket
- Time when a socket was assigned to the request. -
lookup
- Time when the DNS lookup finished. -
connect
- Time when the socket successfully connected. -
secureConnect
- Time when the socket securely connected. -
upload
- Time when the request finished uploading. -
response
- Time when the request firedresponse
event. -
end
- Time when the response firedend
event. -
error
- Time when the request firederror
event. -
abort
- Time when the request firedabort
event. -
phases
-
wait
-timings.socket - timings.start
-
dns
-timings.lookup - timings.socket
-
tcp
-timings.connect - timings.lookup
-
tls
-timings.secureConnect - timings.connect
-
request
-timings.upload - (timings.secureConnect || timings.connect)
-
firstByte
-timings.response - timings.upload
-
download
-timings.end - timings.response
-
total
-(timings.end || timings.error || timings.abort) - timings.start
-
If something has not been measured yet, it will be undefined
.
MIT