How to speed up file encryption in node-cryptico?

Question

Encryption

Faced the problem of asymmetric file encryption, there is a file with 100k lines in each column of 144 characters, encryption takes a long time, very long, is it possible to speed it up somehow? Perhaps there are other options for asymmetric file encryption? Or am I going in the wrong direction altogether? It is necessary that the files on the server be encrypted,

as I have done now:
1) The user sends the file to the server
2) The data is checked on the server
3) After successful verification, the file is encrypted and saved