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lang-cpp
dd's source code: lingrok.org/xref/coreutils/src/dd.cfstreams have some overhead dealing with locales, butddappears to be usingreadwhich has none of the associated locale-checking. Even inios::binarymode, you still pay some of that penalty. How does your perf change if you use aFILE*instead? It's not as C++, but if perf is your concern...Releasemode, but if not - there could be worth results inDebug