This is a sample script for exporting Google Docs files (Spreadsheets, Documents, and so on) in PDF format with batch requests using Google Apps Script.
As a reference sample situation, in order to export 100 Google Document files as PDF files, when I tested this sample script, the processing time was about 150 seconds and no error occurred. And, I confirmed that 100 valid PDF files were created in my Google Drive.
Kanshi Tanaike has been busy again, this time looking at how you can handle batch exports from Google Docs, Sheets and Slides using Google Apps Script. There is quite a bit of engineering to get your head around but if you are looking for a copy/paste solution everything is well commented for you to drop this code into your own project. If you’d like more context about the solution there is a related post on Stack Overflow.