[curiouscoding]

Try measuring it! You'll quickly see that the latency of addressing n bytes of memory is definitely not O(1).

See eg "The Myth of RAM": https://www.ilikebigbits.com/2014_04_21_myth_of_ram_1.html

[dmitrygr]

100% wrong

8^(1/3) is 2

So according to OP (and you by agreement), upgrading my machine from 4GB of RAM to 32GB should double my RAM access time. Obviously, and demonstrably, nothing of the sort occurs!

[tabender]

But for another example, we often say array access is O(1) - but if you increased the size of your array by 8x (assuming you were already operating at the speed of light) you would see that increase!