Profiling and Performance

cat-development-tools::profiling

Development tools to help you figure out the performance of your code.

Flame graphs are excellent for visualizing CPU usage and identifying hot spots. System profilers like perf provide more detailed information. Benchmarking helps you measure the impact of code changes. Memory profilers help you find memory leaks and excessive allocations. Tracing helps you understand the flow of your program.

TopicRust Crates
Flame Graphscargo flamegraph generates flame graphs from Rust programs.
System Profilers (In-depth Analysis)perf is a powerful system profiler for Linux. cargo flamegraph often uses perf under the hood. dtrace is another system profiler for macOS, BSD. VTune (Intel) is a commercial profiler.
BenchmarkingBuilt-in cargo bench allows you to write benchmarks directly in your Rust code.
In-Code Profiling (Specific Code Regions)measure_time is a simple crate for measuring the execution time of code blocks.
Memory Profilingvalgrind (with massif or memcheck): While not Rust-specific, Valgrind is a powerful tool for memory profiling and leak detection. You'd run your Rust program under Valgrind.
Tracing - Understanding Program Flowtracing: While not strictly a profiler in the performance sense, tracing allows you to instrument your code with spans and events, which can be invaluable for understanding the flow of execution and identifying bottlenecks. Often used in combination with other profiling tools.
Sampling Profilers (CPU Usage)samply is a native sampling profiler focusing on ease of use. callgrind is a performance analysis tool often used with kcachegrind for visualization.

Code Examples

Benchmarking

RecipeCratesCategories
cargo flamegraphcargo-flamegraphcat-development-tools::profiling
criterioncriterioncat-development-tools::profiling
divandivancat-development-tools::profiling
hyperfinehyperfinecat-development-tools::profiling

Memory Usage Analysis

Low-level Profiling Tools

RecipeCratesCategories
Inspect the Generated Assemblycargo-show-asmcat-development-tools::profiling

References