We haven't even come close to exhausting 64-bit addresses yet. If you think the bit number makes things faster, it's technically the opposite.
It's a link to an article I found interesting. It basically details why we're still using 64-bit CPUs, just as you mentioned.
Comment OP must never learn anything new. Good find.
We don't even have true 64-bit addressing yet. x86-64 uses only 48 bits of a 64 bit address and 64-bit ARM can use anything between 40 and 52 depending on the specific configuration.
Yeah, 64 bit handles almost all use cases we have. Sometimes we want double the precision (a double) or length (a long), but we can do that without being 128-bit. It's harder to do half. Sure, it'd be slightly faster for some things, but it's not significant.
And you can get 128-bit data to the CPU, so those things can be fast if we need them to be.
And we have wide instructions that can process this data, such as for multimedia applications.
Addressing and memory size has been the historic motivator for wider registers, but it’s probably not going to be in my lifetime that I see the need for 128.
There's plenty of instructions for processing integers and fp numbers from 8 bits to 512 bits with a single instruction and register. There's been a lot of work in packed math instructions for neural network inference.
Is this a question?
For the people who don't know the answer? Yes.
Not everything you see is intended for your consumption. Let people enjoy learning things.
I totally agree. I know a teacher who who likes to say:
"I believe there really is no such thing as a dumb question. As long as it's an honest question (not rhetorical or sarcastic), then it's a genuine request for more information. So even if it's coming from a place of extreme ignorance, asking a question is an attempt to learn something, and the effort should be applauded."
jwr1@kbin.earth to 
Is this a question?
We haven't even come close to exhausting 64-bit addresses yet. If you think the bit number makes things faster, it's technically the opposite.
It's a link to an article I found interesting. It basically details why we're still using 64-bit CPUs, just as you mentioned.
Comment OP must never learn anything new. Good find.
We don't even have true 64-bit addressing yet. x86-64 uses only 48 bits of a 64 bit address and 64-bit ARM can use anything between 40 and 52 depending on the specific configuration.
Yeah, 64 bit handles almost all use cases we have. Sometimes we want double the precision (a double) or length (a long), but we can do that without being 128-bit. It's harder to do half. Sure, it'd be slightly faster for some things, but it's not significant.
And you can get 128-bit data to the CPU, so those things can be fast if we need them to be.
And we have wide instructions that can process this data, such as for multimedia applications.
Addressing and memory size has been the historic motivator for wider registers, but it’s probably not going to be in my lifetime that I see the need for 128.
There's plenty of instructions for processing integers and fp numbers from 8 bits to 512 bits with a single instruction and register. There's been a lot of work in packed math instructions for neural network inference.
For the people who don't know the answer? Yes.
Not everything you see is intended for your consumption. Let people enjoy learning things.
I totally agree. I know a teacher who who likes to say:
"I believe there really is no such thing as a dumb question. As long as it's an honest question (not rhetorical or sarcastic), then it's a genuine request for more information. So even if it's coming from a place of extreme ignorance, asking a question is an attempt to learn something, and the effort should be applauded."
Learned from the teacher. Thanks.
Woah, meta.
Yes, it is.
This is not a question, though.