wallet77
Purpose
Simple wrapper around "inspector" module. Basically it adds :
- promises & async/await syntax
- S3 exporter
Compatibility
| Version | Supported | Tested |
|---|---|---|
| 20.x | yes | yes |
| 18.x | yes | yes |
| 16.x | yes | yes |
In order to have all features we recommend to use at least Node.js version 10 or higher.
Installation
$ npm install inspector-api --saveUsage
CPU profiling
const Inspector = require('inspector-api')
const inspector = new Inspector()
await inspector.profiler.enable()
await inspector.profiler.start()
// Invoke business logic under measurement here...
// some time later...
await inspector.profiler.stop()
Memory sampling
const Inspector = require('inspector-api')
const inspector = new Inspector()
await inspector.heap.enable()
await inspector.heap.startSampling()
// Invoke business logic under measurement here...
// some time later...
await inspector.heap.stopSampling()
Memory snapshot
const Inspector = require('inspector-api')
const inspector = new Inspector()
await inspector.heap.takeSnapshot()
Code coverage
const Inspector = require('inspector-api')
const inspector = new Inspector()
await inspector.profiler.enable()
await inspector.profiler.startPreciseCoverage({ callCount: true, detailed: true })
const data = await inspector.profiler.takePreciseCoverage()
await inspector.profiler.stopPreciseCoverage()
Use S3 exporter
const Inspector = require('inspector-api')
const inspector = new Inspector({
storage: {
type: 's3',
bucket: 'testBucket',
dir: 'inspector'
}
})
await inspector.profiler.enable()
await inspector.profiler.start()
// Invoke business logic under measurement here...
// some time later...
await inspector.profiler.stop()
Warning: it seems that the new AWS SDK leads to unexpected error if you use the takeSnapshot method (you should use memory sampling)
Constructor's config
new inspector([config])config.storage
| Option | description | Default value |
|---|---|---|
type |
Storage type (raw, s3 or fs) | raw |
bucket |
S3 bucket's name | none |
dir |
Directory where to store the file | none |
If you use fs, the generated data will be store on the disk in your default tmp directory.
You can display it in Node.js with the command require('os').tmpdir()
Test
$ npm testCoverage report can be found in coverage/.