From the article: "The overhead of our implementation of the safe stack is very close to zero (0.01% on the Phoronix benchmarks)". That's quite awesome, congratulations.
"This is lower than the overhead of stack cookies, which are supported by LLVM and are commonly used today, yet the security guarantees of the safe stack are strictly stronger than stack cookies."
"This is lower than the overhead of stack cookies, which are supported by LLVM and are commonly used today, yet the security guarantees of the safe stack are strictly stronger than stack cookies."
Win-win for everyone