Use range requests to get the data from the server chunk by chunk and send it back to the server chunk-by-chunk. I need to run the code for large array sizes, like 4K*8K. This implementation would’ve been a lot cleaner if I used functional composition and subscribed to the observable myself instead of extending the class, but I wanted to mimic how it might look if it was implemented in RxJS. play_arrow. Fonction à exécuter sur chaque valeur du tableau, elle prend 3 arguments : element 1.1. You should rethink about what you are doing, some possible solution are: What you need is processing relative big data in a low memory, low performance environment. link brightness_4 code