Summary:
We were using `window.performance` to measure performance. This was because the equivalent node.js API `perf_hooks` wasn't available in the electron version we were using back then.
However, `perf_hooks` has landed in electron meanwhile, so I am moving to this API, as it works for the headless version and jest tests, too.
This allows us to delete the babel transform that was used for node-based tests, where the browser API was replaced with the node API
Reviewed By: jknoxville
Differential Revision: D13860133
fbshipit-source-id: cf1395004fac046dd55751ff465af494173b2cbf
Summary:
I tried switching Flipper to use the node.js module: https://nodejs.org/api/perf_hooks.html instead of electrons window.performance. But the module couldn't be found.
So instead, I'm just replacing it in the pure node tests.
This means tests without node can work without issues.
Reviewed By: danielbuechele
Differential Revision: D10302114
fbshipit-source-id: b3b8aa5fb350a8246fcdfc2a80cc72daec2448d7
