How many files can be placed in one folder without the burden of opening a file?

Question

Data storage

Dear experts, tell me how many files can be placed in one folder without loading the file to open on the server?
If you put 100,000 txt files in a folder and open a file from there, will it take longer to open than if there were, for example, 50,000 or 10,000 files in the folder?

Answer 1

the number of files in the directory does not affect the opening of files.
but affects getting a list of files in the directory, if one is required.