How to generate a tsc perf build

Make sure that the normal lint steps run first to generate all the factgraph related stuff
cd into the package whose tsc build you'd like to test (probably df-client-app/)
Run npx tsc --generateTrace ~/my-tsc-trace-output-directory replacing the output directory with whatever you'd like
Open chrome, in the address bar type chrome://tracing/
Click the load button to open up the trace generated in step 3. (Should be a json file called trace.json)