CODEWITHSUNDEEP
cperformancepipestdinfopen
Ryan
Ryan

Reputation: 10131

How efficient of a program that read from stdin than a file?

Actually this is not particular to C, but assume using C first, if I have a program that read from stdin, and a program read from a file using fopen, how to compare their efficiency in processing file?

What would be the overheads on both cases?

Upvotes: 0

Views: 123

Answers (1)

R.. GitHub STOP HELPING ICE
R.. GitHub STOP HELPING ICE

Reputation: 215577

If you mean to compare reading from a file that's received as stdin (e.g. ./prog < file) versus opened within the program via fopen, there should be no difference in efficiency whatsoever.

If you mean to compare reading from a pipe or terminal or other non-regular-file received as stdin versus opening regular file with fopen, you're comparing apples and oranges and I don't think the question makes sense without further details.

Upvotes: 2

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