koa-server-timing

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Koa 2 Server-Timing header middleware.

Installation

``bash
$ npm install koa-server-timing
`

API

`js
const Koa = require('koa');
const app = new Koa();
app.use(require('koa-server-timing')({ total: true / default to NODE_ENV !== 'production' / }));

ctx.state.timings.startSpan('A Task description', 'taskSlug' / optional, will be created a-task-description, if missed /)

/ ... do some long task to measure here /
ctx.state.timings.stopSpan('A Task description' / or 'taskSlug' or return from startSpan /);

`

$3

* total where do you want to see total processing time in Server-Timings

Example

`js
const timings = require('koa-server-timing');
const koa = require('koa');
const db = require('./mongoose');
const app = koa();

app.use(timings());

app.listen(3000);

console.log('listening on port 3000');

app.use(async (ctx, next) => {
ctx.state.timings.startSpan('Query DB for User object');
const user = await db.User.findOne({ email: 'test@test.com' }).exec();
ctx.state.timings.stopSpan('Query DB for User object'); // or just pass return of startSpan (it will be a slug)
})

`

$3

- Small, no dependencies, 100% test coverage
- Uses process.hrtime, so, no extra timers and very precise

$3


- See @thomasbrueggemann/node-servertiming` for non-Koa version that uses Timers

License

MIT

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[license-url]: LICENSE
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