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React recently introduced an experimental profiler API. After discussing this API with several teams at Facebook, one common piece of feedback was that the performance information would be more useful if it could be associated with the events that caused the application to render (e.g. button click, XHR response). Tracing these events (or "interactions") would enable more powerful tooling to be built around the timing information, capable of answering questions like "What caused this really slow commit?" or "How long does it typically take for this interaction to update the DOM?".
With version 16.4.3, React added experimental support for this tracing by way of a new NPM package, scheduler. However the public API for this package is not yet finalized and will likely change with upcoming minor releases, so it should be used with caution.
This is a collection of the things I believe about software development. I have worked for years building backend and data processing systems, so read the below within that context.
I have now LEAKED the questions I ask in interviews! Prep now and hack this test!
Interview outline
Questions variation 2
intro (read script below)
Tell me a story about the last time you taught someone something at work. what was the process like? what went well / what was challenging? (This is a warmup softball question. The candidate will be prepared for something like this, and will relax while answering it.)
Tell me a story about the last thing someone taught you at work. (Looking for: ability to learn, learning strategies.)
Substitute for #2 for more senior candidates: How do you deal with stress? (Looking for: any thoughtful approach at all.)
What’s the hard part of [your job]? (Look for reasons why it's hard; what the candidate is doing to learn more about making it easy. Is it technical or do they have the awareness to talk about people things?)
Tell me a story about a time modularity (or encapsulation) worked out for you. how do you pick where to encapsulate? what’s good about modularity? what’s difficult? (This is the single most important question fo