2a70ebf667
- add missing syntaxes - don't put prompt if no command outputs to ease copy/paste and use `sh` syntax - always use `$` as prompt and use `console` syntax
2.0 KiB
2.0 KiB
@vates/cached-dns.lookup
Cached implementation of dns.lookup
Install
Installation of the npm package:
npm install --save @vates/cached-dns.lookup
Usage
Node does not cache queries to dns.lookup, which can lead application doing a lot of connections to have perf issues and to saturate Node threads pool.
This library attempts to mitigate these problems by providing a version of this function with a version short cache, applied on both errors and results.
Limitation:
verbatim: falseoption is not supported.
It has exactly the same API as the native method and can be used directly:
import { createCachedLookup } from '@vates/cached-dns.lookup'
const lookup = createCachedLookup()
lookup('example.net', { all: true, family: 0 }, (error, result) => {
if (error != null) {
return console.warn(error)
}
console.log(result)
})
Or it can be used to replace the native implementation and speed up the whole app:
// assign our cached implementation to dns.lookup
const restore = createCachedLookup().patchGlobal()
// to restore the previous implementation
restore()
Contributions
Contributions are very welcomed, either on the documentation or on the code.
You may:
- report any issue you've encountered;
- fork and create a pull request.