Function FastMemcmp

publication/source_code/include/duckdb/fast_mem.hpp:547–684

This templated memcmp is significantly faster than std::memcmp, but only when you are calling memcmp with a const size in a loop. For instance `while ( ) { memcmp( , , const_size); ... }`

//! but only when you are calling memcmp with a const size in a loop.
//! For instance `while (<cond>) { memcmp(<str1>, <str2>, const_size); ... }`
static inline int FastMemcmp(const void* str1, const void* str2, const size_t size) {
	// LCOV_EXCL_START
	switch (size) {
	case 0:
		return 0;
	case 1:
		return MemcmpFixed<1>(str1, str2);
	case 2:
		return MemcmpFixed<2>(str1, str2);
	case 3:
		return MemcmpFixed<3>(str1, str2);
	case 4:
		return MemcmpFixed<4>(str1, str2);
	case 5:
		return MemcmpFixed<5>(str1, str2);
	case 6:
		return MemcmpFixed<6>(str1, str2);
	case 7:
		return MemcmpFixed<7>(str1, str2);
	case 8:
		return MemcmpFixed<8>(str1, str2);
	case 9:
		return MemcmpFixed<9>(str1, str2);
	case 10:
		return MemcmpFixed<10>(str1, str2);
	case 11:
		return MemcmpFixed<11>(str1, str2);
	case 12:
		return MemcmpFixed<12>(str1, str2);
	case 13:
		return MemcmpFixed<13>(str1, str2);
	case 14:
		return MemcmpFixed<14>(str1, str2);
	case 15:
		return MemcmpFixed<15>(str1, str2);
	case 16:
		return MemcmpFixed<16>(str1, str2);
	case 17:
		return MemcmpFixed<17>(str1, str2);
	case 18:
		return MemcmpFixed<18>(str1, str2);
	case 19:
		return MemcmpFixed<19>(str1, str2);
	case 20:
		return MemcmpFixed<20>(str1, str2);
	case 21:
		return MemcmpFixed<21>(str1, str2);
	case 22:
		return MemcmpFixed<22>(str1, str2);
	case 23:
		return MemcmpFixed<23>(str1, str2);
	case 24:
		return MemcmpFixed<24>(str1, str2);
	case 25:
		return MemcmpFixed<25>(str1, str2);
	case 26:
		return MemcmpFixed<26>(str1, str2);
	case 27: