A new tool to grab the results of Node.js benchmark CI

[joyeecheung]

See https://gist.github.com/joyeecheung/b55c88ee465d552d7ed1dc34e67305ea for a prototype

[joyeecheung]

Hmm, also it would be helpful to grab the results of test-pull-request and display the failed cases in one go (ideally that should be the job of Jenkins plugins but there have been some trouble with the resource leak bug of those plugins). See https://ci.nodejs.org/job/node-test-pull-request/api/

[joyeecheung]

ncu-ci has already landed so this can be closed.