'Out of Memory' errors during TypeScript compilation generally happen when the TypeScript compiler (TSC) has to process too many files or very complex types. One solution is to optimize your `tsconfig.json`. For example, limiting the number of files included in the compilation using the `include` and `exclude` options can significantly reduce memory consumption. You can also break down large projects into smaller, manageable pieces using project references, which allow each part to compile independently. Another solution is to enable `skipLibCheck` to avoid checking type definitions of external libraries, which can free up memory. If your project uses deeply nested types or recursive types, refactoring them can help reduce the compiler's workload. Additionally, increasing Node.js's memory limit with the `--max-old-space-size` flag can prevent these errors, but optimizing the project structure is the best long-term fix.