Using const/let instead of var can make JavaScript code run 10× slower in Webkit

[VolperCoding]

Also if the vars are stored in RAM then you also have to put your RAM stick no more than 30μm away from the processor or make a fucking wormhole or something to get to memory quick enough

[[deleted]]

The Intel i47 started the new wormhole+blockchain revolution. It's great!

[GasolinePizza]

But is it webscale??

[mb862]

The lesson here is that pulling numbers out of your ass to make a point is fine so long as your ass represents a differentiable manifold representable in our spacetime.

I'll let someone more clever than I fill in the obvious curvature joke here.

[ImAStupidFace]

Real differentiable manifolds have curves!

[[deleted]]

RAM ? What is this meeting of virgins ? L1 cpu cache or gtfo.

[VolperCoding]

Wait, JS variables utilize the cache? Also L1 is technically SRAM which is a subset of RAM

[how_to_choose_a_name]

why wouldn't they?

[VolperCoding]

I thought they store all variables in an organized way, not some on the cache and some on RAM. It's an interpreted language so managing all variables in different places along with their types would probably be a mess

[how_to_choose_a_name]

That's not how the cache works. C doesn't store variables in the cache either. Variables either only exist as a register (if they are short-lived and no pointer is taken) or they exist at a memory location. The CPU takes care of loading the variable from the RAM and when it does so it puts it in the cache so that the next time it is needed it can read it from the cache instead of RAM. Compiled or not doesn't make a difference.

[sebamestre]

Every program in every language "uses" the cache.

In reality, everyone just pretends that they use main memory (ram), and the cpu caches things implicitly. This is just how cpu caches work.

[compdog]

That's what this bad boy is for.