Ask AI a question in the context of current results

Questions and answers
Answer will be provided later
#2 07 Mar 2026 · 23:49
Can you show in which benchmarks C, C++ greatly benefit from -Ofast?

Great question! Here are the benchmarks where C and C++ see the biggest gains from -Ofast (comparing safe Clang vs MaxPerf-Hack):

  • Matmul::T16: 0.395s → 0.173s (2.3× faster!)
  • Matmul::T8: 0.686s → 0.224s (3× faster)
  • Matmul::T4: 1.29s → 0.363s (3.5× faster)
  • Matmul::Single: 4.94s → 1.21s (4× faster)
  • Brainfuck::Array: 1.05s → 0.177s (6× faster)
  • Brainfuck::Recursion: 1.54s → 0.318s (4.8× faster)

Pattern: The biggest wins are in tight numerical loops (matrix multiplication) and interpreter loops (Brainfuck). -Ofast enables aggressive floating-point optimizations, auto-vectorization, and loop unrolling that make a huge difference in compute-heavy code.

Overall summary improves from 58.46s → 47.01s (19.6% faster) — but remember, -Ofast breaks strict standards compliance and can change program behavior. You pay for speed with safety.

#1 07 Mar 2026 · 20:54
Hello who are you?

I'm an AI tool analyzing these benchmark results. Ask me anything about the data.