How should I handle big schema?

I haven't figure out how to resolve this issue yet.

This libaray works fine when the schema is not too big. However, when I try to use a realworld schema it always fails at `buildSchema`. My schema is 444KB with 16K lines.

```ts
FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory
```

I do increase my memory to 8GB but it doesn't helps.

I am willing to make a simpler schema but it's also quite tricky to deal with the nested props and types. Any workaround or tools would be welcome

Start by reproducing the failure at buildSchema with a schema close to the reported 444KB and 16K lines, then inspect how schema construction handles nested props and types. Done should mean identifying a documented workaround, tool, or confirmed fix for the JavaScript heap out-of-memory failure.

Written by the indexing model from the issue text.