Assembly

Low-level language with a very strong correspondence between the instruction in the language and the architecture's machine code instructions.

When to Use

Low-Level Hardware & OS Kernel Programming: Writing bootloaders, CPU context switches, interrupt handlers, and page table setup.
Micro-Architectural SIMD Vector Optimization: Crafting hand-tuned AVX-512, Neon, or SSE assembly kernels for game physics and matrix multiplication.
Reverse Engineering & Exploit Analysis: Disassembling binary executables to audit firmware, analyze malware, or debug compiler crashes.
Embedded Bare-Metal Firmware: Direct CPU register manipulation on microcontrollers without operating system abstractions.

section .data
    msg db "Hello, World!", 0xa
    len equ $ - msg