Display Request Latency Percentiles on Dashboard

[burtonr]

Provide more insights into users' functions on the dashboard to be able to know the health and status of your function at-a-glance

Expected Behaviour

Visualize the function's call latency percentiles similar to the success/error counts on the dashboard

Current Behaviour

new feature

Possible Solution

Possible use of Prometheus metrics to do a summation of request times per function

Steps to Reproduce (for bugs)

N/A

Context

From a discussion on Twitter: https://twitter.com/alexellisuk/status/1148597378599084033

Loan Testing document (from Twitter thread): https://www.digitalocean.com/community/tutorials/an-introduction-to-load-testing#glossary

Your Environment

• FaaS-CLI version ( Full output from: faas-cli version ):

• Docker version docker version (e.g. Docker 17.0.05 ):

• Are you using Docker Swarm or Kubernetes (FaaS-netes)?

• Operating System and version (e.g. Linux, Windows, MacOS):

• Link to your project or a code example to reproduce issue:

• Please also follow the troubleshooting guide and paste in any other diagnostic information you have:

[alexellis]

Thank you for logging this.

I'd like to see some mock-ups and suggestions on how this should look.

[alexellis]

@Qolzam + @burtonr cc