https://issues.dlang.org/show_bug.cgi?id=14571
--- Comment #16 from Walter Bright <bugzi...@digitalmars.com> --- (In reply to Vladimir Panteleev from comment #15) > DLLs are relocated at load time (and usually are linked with a base unlikely > to conflict, so relocations are often not done). The hypothetical ptr[5] > would be relocated as well. It goes through a relocation thunk. So does TLS. > Not on Win32 Win32 is dead. Even phones are 64 bit processors, aren't they? > I would need to run some benchmarks to test this. But a quick test shows > that 64-bit code has dedicated CPU instructions for relative addressing of > globals, but indexing arrays on the heap still requires two instructions > (mov rax, arr + mov dword ptr [arr+idx*4], value). 64 bit code indexes static data with the Program Counter. Furthermore, if you're accessing large arrays, the cost of getting a pointer to the start of it is utterly swamped by accessing the data itself. Like I said, I bet if you do some benchmarking, you'd be hard pressed to find ANY improvement of static large arrays over allocated ones. --
