bench targets

• small size <= 16 bytes: llvm inlines as single mov: 1, 2, 4, 8, 16
• medium <= 256 bytes: llvm inlines memcpy as multiple move: 32, 64, 128, 256
• large > 256 bytes: llvm uses memcpy: 512, 1024, 2048, 4096

Literal:

• integers, static string
• String?

Bench this code

pub fn indexing(x: usize) -> u8 {
	let array: [u8; N] = ?;
	array[x]
}

Need: codegen? to

• generate array
• a simple [{int}; N]: memcpy? zero or non-zero
• random items: [1, 2, ..., rand()]
• x:
  • is inside: choose happy path
  • out of bound => panic ?

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output: rustc -Vv bench machine: cpu, os? plot .dot/.svg