This option gives you the chance to have TypeScript emit a v8 CPU profile during the compiler run. The CPU profile can provide insight into why your builds may be slow.

This option can only be used from the CLI via: --generateCpuProfile tsc-output.cpuprofile.

npm run tsc --generateCpuProfile tsc-output.cpuprofile

npm run tsc --generateCpuProfile tsc-output.cpuprofile

This file can be opened in a chromium based browser like Chrome or Edge Developer in the CPU profiler section. You can learn more about understanding the compilers performance in the TypeScript wiki section on performance.