server-timing

server-timing

This module adds Server-Timing to response headers. Example is here and open chrome devtool network tab.

You can use this as a express module / basic http function.

Install

$ npm install server-timing -S

Usage

const express = require('express')
const serverTiming = require('server-timing')

const app = express()
app.use(serverTiming())

app.use((req, res, next) => {
  res.startTime('file', "File IO metric")
  setTimeout(() => {
    res.endTime('file')
  }, 100)
  next()
})
app.use((req, res, next) => {
  // All timings should be in milliseconds (s). See issue #9 (https://github.com/yosuke-furukawa/server-timing/issues/9).
  res.setMetric('db', 100.0, "Database metric")
  res.setMetric('api', 200.0, "HTTP/API metric")
  res.setMetric('cache', 300.0, "cache metric")
  next()
})
app.use((req, res, next) => {
  res.send('hello')
})

Result