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What does this C code do [Duffs device]? - Stack Overflow Duff's device In computer science, Duff's device is an optimized implementation of a serial copy that uses a technique widely applied in assembly language for loop unwinding Its discovery is credited to Tom Duff in November of 1983, who at the time was working for Lucasfilm
c - How does Duffs device work? - Stack Overflow What Duff's device does is implement this idea, in C, but (as you saw on the Wiki) with serial copies What you're seeing above, with the unwound example, is 10 comparisons compared to 100 in the original - this amounts to a minor, but possibly significant, optimisation
gcc - Is Duffs device still useful? - Stack Overflow In the Duff's Device case, the target was a memory-mapped register, and the source was an arbitrary pointer Today, the memory-mapped register would likely have to be tagged as volatile and it's not clear whether the compiler could determine whether the source and destination pointers could ever alias
What is the difference between varchar and nvarchar? An nvarchar column can store any Unicode data A varchar column is restricted to an 8-bit codepage Some people think that varchar should be used because it takes up less space
What is the difference between git pull and git fetch? Our alternative approach has become git fetch; git reset --hard origin master as part of our workflow It blows away local changes, keeps you up to date with master BUT makes sure you don't just pull in new changes on top on current changes and make a mess