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tom_mellior
on June 25, 2020
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C performance mystery: delete unused string consta...
I can't think of a plausible way in which an unused global would affect compiler optimizations. Could you elaborate?
HelloNurse
on June 25, 2020
[–]
The pointer probably precedes interesting variables in the same data segment, which therefore shift to a different address that is cached differently.
tom_mellior
on June 25, 2020
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Sure, but that's not a compiler optimization issue. The compiler will emit the same instructions, they will just execute at a different speed if the data is elsewhere.
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