• VSCode Version: Stable/Insiders
• OS Version: macOS

Steps to Reproduce:

1. Open a 1.5GB file (with Line Model or Piece Tree)
2. It opens successfully (say the machine has enough memory)
3. Open a 2.1 GB file
4. It freezes after 1+ mins.

As we load the whole file to memory, it exceeds the memory limit of v8 process. We can expose max_old_space_size flag in cli then users can increase the limit themselves.