PDF-Lib Garbage Collection Questions

[developmentBuild]

Hi,

Some context:
I'm currently using pdf-lib to do some server side pdf generating and it's been working quite well. One thing I've noticed was a large spike in my server memory through out the day when the server is in use. I'm quite confident to identify PDB-Lib as the under lying cause since there are quite a few images being loaded and the document size is dynamic dependent of the data used, other then that the server mainly handles simple db request. I'm doing optimisation by implementing a queue to ensure FIFO of pdf generation instead of just allowing each request to create immediately.

But I also want to know what is the current behaviour when it comes to garbage collection when it comes to pdf documents that have called the .save() method. Is there a way to reference the doc instance and tell it to immediately start garbage collection i.e:

const pdfDoc = await PDFDocument.create();

//some code generating the document

const base64 = await pdfDoc.saveAsBase64();
pdfDoc.free();
return base64;

Or does it happen immediately after save()?

I saw there was an initial discussion on it in the an issues: #914 but it didn't really answer my question.