DiagnosticResult includes request duration

[mshustov]

🚀 Feature Proposal

It might be really useful for debugging purposes to include response time as part of DiagnosticResult.

Motivation

Solving the problem in the user-land is not the best DX.
We can start with something simple - a time between a request method was called and a response from ES is fully received. Later, we can introduce a more detailed explanation for different phases - DNS lookup, TLS handshake, etc.

Example

client.on('....', (error, event) => {
  console.log(`request to ${event.meta.request.path} took ${event.meta.took} ms`)'
});

await client.search(....)

[ArchitGajjar]

HI @JoshMock - Can I work on this issue ? this will be my first contribution to this project ? Thank you very much!

[JoshMock]

Absolutely @ArchitGajjar.