Lua SHA-256 Implementations

This repository contains high-performance SHA-256 hash implementations for various Lua environments, including:

• LuaJIT (sha256/luajit.lua): Hyperoptimized for LuaJIT using FFI for fast memory access and buffer manipulation.

  • Fastest run: ~0.0076 seconds (1,315,270 hashes/sec)
  • Not compatible with standard Lua or Luau.

• Luau (sha256/luau.lua): Optimized for the Luau runtime (used by Roblox and others).

  • Fastest run: ~0.066 seconds (151,081 hashes/sec)
  • Uses Luau-specific optimizations.

• Lua 5.4 (sha256/lua54.lua): Standard Lua 5.4 implementation.

  • Fastest run: ~0.0076 seconds (1,315,270 hashes/sec)
  • Uses standard Lua 5.4 optimizations.

• Benchmarks: Use benchmark.lua to automatically detect your Lua version and run the appropriate benchmark.

Usage

LuaJIT

luajit benchmark.lua

Luau

luau benchmark.lua

Lua 5.4

lua benchmark.lua