yarn add superagent-node-http-timings
npm i --save superagent-node-http-timings
This plugin for superagent gives you an easy interface to get http timings information. Primary use case is to be able to monitor and optimize network requests in node in a similar way to how you do it in browser with network inspector.
const request = require('superagent');
const logNetworkTime = require('superagent-node-http-timings');
request
.get(`https://google.com`)
.use(logNetworkTime((err, result) => {
if (err) {
return console.error(err);
}
console.log(result);
}))
.then(x => x);
Sample results (timings are in milliseconds)1:
{
"status": 301,
"timings": {
"socketAssigned": 4.0982,
"dnsLookup": 38.9614,
"tcpConnection": 42.1931,
"tlsHandshake": 105.221,
"firstByte": 67.0892,
"contentTransfer": 0.6482,
"total": 258.2111
},
"url": "https://google.com"
}
socketAssigned - time since call was initiated until socket got assigned to requestdnsLookup - time since socketAssigned until dns lookup end, will be undefined when request was sent to IP (no domain)tcpConnection - time since dnsLookup (or socketAssigned if IP was used) until connection was establishedtlsHandshake - time since tcpConnection until until ssl negotiation end, will be undefined when request was sent via httpfirstByte - time since tlsHandshake (or tcpConnection for http request) until first bytecontentTransfer - time since firstByte until response endPRs are welcome! :)
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