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https://github.com/yosuke-furukawa/server-timing
This module adds [Server-Timing](https://www.w3.org/TR/server-timing/) to response headers, see [example](https://server-timing.now.sh/) and open chrome dev tool
https://github.com/yosuke-furukawa/server-timing
express nodejs server-timing
Last synced: 1 day ago
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This module adds [Server-Timing](https://www.w3.org/TR/server-timing/) to response headers, see [example](https://server-timing.now.sh/) and open chrome dev tool
- Host: GitHub
- URL: https://github.com/yosuke-furukawa/server-timing
- Owner: yosuke-furukawa
- Created: 2017-02-08T08:03:58.000Z (almost 8 years ago)
- Default Branch: master
- Last Pushed: 2024-04-09T08:51:40.000Z (9 months ago)
- Last Synced: 2024-04-15T12:17:35.118Z (8 months ago)
- Topics: express, nodejs, server-timing
- Language: JavaScript
- Homepage:
- Size: 577 KB
- Stars: 120
- Watchers: 7
- Forks: 19
- Open Issues: 14
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# server-timing
[](https://travis-ci.org/yosuke-furukawa/server-timing)
[](https://coveralls.io/github/yosuke-furukawa/server-timing?branch=improve_coverage)
This module adds [Server-Timing](https://www.w3.org/TR/server-timing/) to response headers.
Example is [here](https://server-timing.now.sh/) and open chrome devtool network tab.
You can use this as a express module / basic http function.
# Install
```
$ npm install server-timing -S
```
# Usage
```javascript
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) => {
// you can see test end time response
res.startTime('test', 'forget to call endTime');
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');
});
```
## Conditionally enabled
```javascript
const express = require('express');
const serverTiming = require('server-timing');
const app = express();
app.use(serverTiming({
// Only send metrics if query parameter `debug` is set to `true`
enabled: (req, res) => req.query.debug === 'true'
}));
```
# API
## constructor(options)
- options.name: string, default `total`, name for the timing item
- options.description: string, default `Total Response Time`, explanation for the timing item
- options.total: boolean, default `true`, add total response time
- options.enabled: boolean | function, default `true`, enable server timing header. If a function is passed, it will be called with two arguments, `request` and `response`, and should return a boolean.
- options.autoEnd: boolean, default `true` automatically endTime is called if timer is not finished.
- options.precision: number, default `+Infinity`, number of decimals to use for timings.
# Result
