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Mark Goldstein

Mark Goldstein

Senior Software Engineer on Chime's App Platform, working on React Native developer tooling and release infrastructure.

Sep 11, 2026

7:09
Can you share some ways in which you've optimized performance for your app?
7:13
Yeah, so I shared a little bit of the challenges previously that are related.
7:18
But in terms of optimizing that are related to that, instrument first has helped us tremendously.
7:25
Being able to measure your app and have telemetry enables you to have clarity on what to optimize, what to fix.
7:32
So things like cold start, warm start, time to time to interaction for the Build time optimizations for development is incredibly rewarding as well, especially if you have a larger team setting up something like a remote build cache and leveraging Expo Fingerprint to decide when you can leverage a build cache build for your development or your agent, or when you actually need to rebuild is incredibly powerful.
8:01
We found that even with a eight plus year old app code base like us, Only 5% of pull requests actually change the fingerprint and require a rebuild.
8:12
And you can save 95% of the time of building the app for most machines.
11:06
How are you all using AI in your day-to-day workflow?

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