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If you work through a math problem with pen and paper or nand2tetris or nandgame.com then it becomes obvious that changing indexes into a register file (a.k.a. pointers) are way faster and easier than wires to move stuff around.

How do you think the EXX and EX AF,AF' instructions work on the Z80?

And EX DE, HL

E to the u, du dx, E to the x, dx!

I must admit I do not know what you are referencing here, sir, but it is always a pleasure to run into your comments on HN.

So much positive compiler-dad energy.

It's the MIT song! At least it used to be, it was a long time ago.

> always a pleasure to run into your comments on HN.

Wow what a nice compliment! Makes my day!

If you feel cheated now, wait until you find out that the ALU in the 8-bit Z80 was just 4 bits. :-)

Does this have any similarities at all to the fact that the Pentium 4 used a 16-bit ALU?