plasma-umass/coz

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

4532 stars · 171 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Coz is a causal profiler for native code written in C/C++ and Rust. It runs performance experiments to predict how optimizing specific lines of code would affect overall throughput or latency, revealing optimization opportunities that traditional profilers miss.

Use cases

• find which lines of code are worth optimizing in a C++ program
• profile a Rust application for performance bottlenecks
• measure the potential speedup from optimizing a function before investing effort
• identify optimization targets in parallel and asynchronous programs
• compare causal profiling results against traditional sampling profilers

When to choose

• you profile native C/C++/Rust code on Linux or macOS
• traditional profilers give misleading hotspots in concurrent or parallel code
• you want to know the expected throughput or latency impact of an optimization before doing it

When to avoid

• you need to profile managed languages like Java, Python, or JavaScript
• you are on Windows or another unsupported platform
• you need a low-overhead always-on production profiler rather than an experimental tool

Facets

cli-tool · maturity active

benchmarking monitoring developer-tools developer-tools performance cli causal-profiling profiler performance-analysis native-code c-cpp-rust command-line linux macos

Member repositories

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