Which of FILE* or ifstream has better memory usage?

Posted by Viet on Stack Overflow See other posts from Stack Overflow or by Viet
Published on 2010-04-30T17:09:01Z Indexed on 2010/04/30 17:17 UTC
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c++

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file

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memory-usage

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ifstream

I need to read fixed number of bytes from files, whose sizes are around 50MB. To be more precise, read a frame from YUV 4:2:0 CIF/QCIF files (~25KB to ~100KB per frame). Not very huge number but I don't want whole file to be in the memory. I'm using C++, in such a case, which of FILE* or ifstream has better (less/minimal) memory usage? Please kindly advise. Thanks!

EDIT:

I read fixed number of bytes: 25KB or 100KB (depending on QCIF/CIF format). The reading is in binary mode and forward-only. No seeking needed. No writing needed, only reading.

EDIT:

If identifying better of them is hard, which one does not require loading the whole file into memory?

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