Explore adding D

[leon0399]

Why D

D was designed as a "better C++" — it keeps C-compatible performance while adding GC, modules, and modern features. It occupies a unique space between systems languages (C, C++, Rust) and managed languages (Java, Go). Benchmarking it would show whether the GC overhead is measurable in compute-heavy workloads.

Key considerations

• GC by default but supports manual memory management via @nogc
• Benchmark should use default GC mode for fairness (like Go)
• Three compilers: DMD (reference, fast compile), LDC (LLVM backend, faster output), GDC (GCC backend)
• LDC is the recommended compiler for performance benchmarks
• ldc2 -O -release for optimized builds
• C-like syntax — implementations should be straightforward ports from C++

Implementation

Implement all 7 benchmark algorithms following the reference implementations (PHP, C++, Python):

• collatz/MaxSequence
• linpack/Linpack
• mandelbrot/Simple
• primes/Atkin
• primes/Simple
• recursion/Tak
• treap/Naive

Setup:

• Create langs/d/benchmark.yml
• Create docker/d/Dockerfile
• Update README.md implementation table