WIP: optimisation of byte opcode

[allnil]

that's a draft #1251
Gonna play with opcodes and see how it works
starting with BYTE
hope CI will be green soon :)

[DaniPopes]

I wouldn't expect that shift + bitand is better here since Uint::byte compiles to indexing into the byte array on little-endian.

I would probably look into the conversion macros and bit shifts in ruint.

---

If you want to see the assembly for the opcode functions you can add this to the crate root:

pub fn make_me_a_table() -> opcode::InstructionTable<DummyHost> {
    core::hint::black_box(opcode::make_instruction_table::<_, primitives::CancunSpec>())
}

And then run cargo asm -p revm-interpreter --lib opcode_name (using cargo-show-asm).

[allnil]

@DaniPopes
thank you! I'll definitely try this!

[rakita]

Closing it. If you have new changes be free to reopen it.