Depends. Text editors like UltraEdit have specific architecture to deal with large files like that. A simple program like Notepad can choke on it.
Likewise an Excel spreadsheet with 100,000 rows can have your modern CPU and 8+GB RAM quite occupied, often with calculations not being instant anymore.
In the case of a service like Dynalist in the browser, you also have to keep in mind that the âprogramâ itself, the âthingâ that is Dynalist and does what Dynalist does, is JavaScript downloaded to the browser, and parsed and executed by the browser, which puts an additional load on that computer with a 100,000 lines document.
@erica is everything really kept in memory or do you write to local storage?