PICTURES Denis Yaroshevskiy ## THIS TALK • tinyurl.com/dycppcon2023 memcmp • copy_if • set intersection MEMCMP ## std::memcmp ## std::memcmp   ## MEMCMP RESULTS, X86  ## eve::algo::mismatch MEMCMP RESULTS, X86 name : mismatch | size : 10000 | type : char | group : avx2+bmi | padding : min  MEMCMP RESULTS

assumptions. class Flatland { public: auto operator <=(const Flatland &rhs) const { return memcmp(this, &rhs, sizeof(Flatland)); } int x; int y; private: int z; }; This is the kind class Flatland { public: auto operator <=(const Flatland& rhs) const { return memcmp(this, &rhs, sizeof(Flatland)); } auto x() const { return x_; } auto y() const { return comparison: bool operator ==(NarrowLand const &lhs, NarrowLand const &rhs) { return !memcmp(&lhs, &rhs, sizeof(NarrowLand)); } Copyright © 2020 by Stephen C. Dewhurst and Daniel Saks

100); //check if (length != 100) { return false; } //compare if (memcmp(writeBuffer, readBuffer, length) != 0) { return false; } else { = sharedMem.Read(readBuffer,100); // check if(length != 100) { return false; } // compare if( memcmp(writeBuffer, readBuffer, length) != 0) { return false; } else { return true; } ## Highly

(lt(__s2[__i], __s1[__i])) return 1; return 0; } #endif return __builtin_memcmp(__s1, __s2, __n); } static _GLIBCXX17_CONSTEXPR size_t length(const char_type* __s) { #if __cplusplus

than $ \text{trace\_printk}() $ . Use of LLVM built-in functions for memset()/memcpy()/memmove()/memcmp(). Since BPF programs cannot perform any function calls other than those to BPF helpers, common #ifndef memmove # define memmove(dest, src, n) __builtin_memmove((dest), (src), (n)) #endif The memcmp() built-in had some corner cases where inlining did not take place due to an LLVM issue in the back

\text{trace\_print}() $ . ### 5. Use of LLVM built-in functions for memset()/memcpy()/memmove()/memcmp() Since BPF programs cannot perform any function calls other than those to BPF helpers, common library #ifndef memmove #define memmove(dest, src, n) __builtin_memmove((dest), (src), (n)) #endif The memcmp() built-in had some corner cases where inlining did not take place due to an LLVM issue in the back

significantly faster than trace_printk(). 5. Use of LLVM built-in functions for memset()/memcpy()/memmove()/memcmp(). Since BPF programs cannot perform any function calls other than those to BPF helpers, common library #ifndef memmove # define memmove(dest, src, n) __builtin_memmove((dest), (src), (n)) #endif The memcmp() built-in had some corner cases where inlining did not take place due to an LLVM issue in the back

least Julia 1.10. source Base.memcmp - Function. memcmp(a::Ptr, b::Ptr, n::Integer) -> Int Call memcmp from the C standard library. ### Julia 1.10 Support for memcmp requires at least Julia 1.9.

least Julia 1.10. source Base.memcmp - Function. memcmp(a::Ptr, b::Ptr, n::Integer) -> Int Call memcmp from the C standard library. ### Julia 1.10 Support for memcmp requires at least Julia 1.9.

least Julia 1.10. source Base.memcmp - Function. memcmp(a::Ptr, b::Ptr, n::Integer) -> Int Call memcmp from the C standard library. ### Julia 1.10 Support for memcmp requires at least Julia 1.9.