I have created node red flow that's is based on hyperledger composer nodes. The flow is working perfectly. What I want to do is a performance evaluation of the created flow (calculate execution time, latency, and throughput). I'm not sure how to achieve that! 
i have tried appmetrics dash, but it doesn't work as I want 
How i can calculate the required performance metrics?
Thank you for your help 
You should be able to trace execution time by using Node.js's console.time feature.
To get more information, you might want to try using the inspector - run Node-RED with Node.js's --inspect option in conjunction with a recent Chromium based browser for the easiest and most comprehensive view.
There are some addition inspection console commands as well - these include some profiling commands:
https://nodejs.org/docs/latest-v8.x/api/console.html#console_inspector_only_methods
If you are using versions newer than Node.js v8.x, there are some extra options.
node --inspect node_modules/node-red/red.js --userDir ./data
