JSON with a size of 1GB, how to properly distribute the load when removing elements from it?

Question

PHP

Good afternoon. I have a JSON with 900,000 elements and a size of 1.2 GB.
What you need: remove multiple values ​​from each element.
Question: how to properly distribute the load so that the server does not fall (on a shared hosting) and it turns out as quickly as possible?
Several options:
1) Split into parts-files of 20,000 elements (long).
2) Through array_slice, set intervals each time (somehow it is doubtful, there is a suspicion that the server will crash). Plus opening a 1.2GB file each pass will require a lot of performance.
What else is there? Thank you!
UPD: what if you run it on your computer through OpenServer? Are there limits or will it depend on the power of the computer?

Answer 1

json streaming php