hp_bench

• Microbenchmarks for C++26 hazard pointer implementations, for Linux x86_64 with gcc.
• Intended to test some performance-critical aspects of implementations.
• Measures:
  • three operations:
    • load and dereference a pointer unprotected (baseline),
    • then the same under hazard pointer protection (adds the cost of hazard pointer protection),
    • then with a hazard pointer constructed and destroyed per iteration (adds the cost of constructing and destroying a nonempty hazard pointer object),
  • at 1 and 8 concurrent threads,
  • with and without 10,000 pre-existing hazard pointers.
• Targets the mm_hp implementation by default. Clone it alongside this repo.
• Pointing it at another implementation is a three-line edit at the top of build.sh.
• To build: ./build.sh.
• To run the microbenchmarks: ./build/hp_bench.
• The output is a configuration block followed by one row per measurement.
• Example output is under results/.