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Re:The “C Is Efficient” Language Fallacy (2006) by supercarrot on Sunday June 19, 2016 @09:17AM (#11932866)
as much as it's not part of the standard, __restrict__ allows limiting the effects of pointer aliasing in C/C++. [1]

[1] : https://en.wikipedia.org/wiki/Restrict

Re:The “C Is Efficient” Language Fallacy (2006) by sharth on Sunday June 19, 2016 @02:29PM (#11933983)
The first line of your reference says that restrict __is__ part of the C99 standard.