benchmarks exhausting heap with engine >^16

[jdmarshall]

npm run benchmarks consistently fails with OOM errors, on a machine with 64GB of memory.

• node 24
• node 22
• node 20
• node 18

All fail.

Only node 16 makes it through the first test and I can't imagine why.

Are you running these as part of the build process?

That is... problematic for a contribution I'd like to make, since IIRC it works better with the v8 version in Node 18.

[jdmarshall]

#658 increases the heap and allows Node 18 to be happy

[jdmarshall]

So I fixed the symptom. I did not fix the cause, and halfway through a walk I believe I understand why.

[jdmarshall]

#687 contains a fix for the obvious problem. Heap analysis didn’t turn up much else.