👾 Add proof of concept leak test 👾

[samccone]

I know this has been a longish time coming but here it is.
Ideally this will run in the same way that we run integration tests, based on the git diff.

This perf test is inline with all of my perf testing in that I have essentially codified the process here.

https://github.com/samccone/leaky provides us with the instrumentation layer so we do not have to worry about it and get to reuse all of our selenium work in our integration suite 💃 .

I currently have this hard coded to test against react, just to get some feedback on what everyone is thinking.

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⛲ React:

initial snapshot: {"documents":3,"jsEventListeners":12,"jsHeapSizeUsed":9127312,"nodes":202}
end snapshot:     {"documents":3,"jsEventListeners":12,"jsHeapSizeUsed":10889192,"nodes":332}

node leak ^ as expected via #1332 (comment)

⛲ Vue

initial snapshot: {"documents":4,"jsEventListeners":7,"jsHeapSizeUsed":4696168,"nodes":293}
end snapshot:     {"documents":4,"jsEventListeners":7,"jsHeapSizeUsed":5681776,"nodes":383}

node leak ^ as expected via #1354

⛲ Angularjs

initial snapshot: {"documents":3,"jsEventListeners":8,"jsHeapSizeUsed":6224976,"nodes":594}
end snapshot:     {"documents":3,"jsEventListeners":8,"jsHeapSizeUsed":8055816,"nodes":684}

node leak ^ as expected via #1335

⛲ Knockoutjs

initial snapshot: {"documents":3,"jsEventListeners":7,"jsHeapSizeUsed":4346992,"nodes":273}
end snapshot:     {"documents":3,"jsEventListeners":37,"jsHeapSizeUsed":5414728,"nodes":363}

node and listener leak ^ as expected via #1334

⛲ Ember

initial snapshot: {"documents":3,"jsEventListeners":5,"jsHeapSizeUsed":15816152,"nodes":267}
end snapshot:     {"documents":3,"jsEventListeners":5,"jsHeapSizeUsed":17672328,"nodes":517}

node leak ^ as expected via #1333

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^ is by no means a comprehensive run of all of the implementations just the ones I have run

[jasonLaster]

Woot woot. Seriously cool stuff

[jasonLaster]

Hmm just react, yo?

[arthurvr]

I currently have this hard coded to test against react, just to get some feedback on what everyone is thinking.

[arthurvr]

This is really neat work ⭐ 💯

[addyosmani]

This is incredibly impressive work.

[arthurvr]

Really cool work! I'm going to close this for now as this was more of a proof of concept. We can come back to this when we've got a final version :)