lshaz: a possibly useful static optimization analysis tool?

[clin1234]

I’ve come across this tool: GitHub - abokhalill/lshaz: Find the microarchitectural performance bugs hiding in your C++ code · GitHub

It claims to detect latency hazards at compile-time: struct layouts that span cache lines, atomics that trigger cross-core invalidation storms, heap allocations in hot loops, virtual dispatch that defeats branch prediction, etc.

Granted, it seems oriented towards x64, but it claims to also support arm64. In addition, it has GH workflow files to run this tool on PRs.

[kraenhansen]

What's your idea? 🙂 To start using it? On what specifically?

[clin1234]

To use in https://github.com/facebook/react-native, specifically in CI, to see if improvements exist, mainly because a good chuck of the codebase is in C++.

[clin1234]

FWIW, it's been tested against abseil: https://abokhalill.github.io/lshaz-writeup/writeups/abseil-deep-dive/

[kraenhansen]

Anything preventing you from taking it for a spin yourself? If you find something, a PR would likely be appreciated if you can describe the problem in enough detail too.