LLVM Docs

Advanced Profiling with LLVM

Master performance bottlenecks with precision instrumentation and analysis tools

Start Profiling

Core Features

Instrumentation

Fine-grained profiling at the instruction and function level using llvm-profiling tools.

Performance Analysis

Real-time heatmaps showing execution patterns and code hotspots.

Optimization Guidance

Auto-suggestions for optimizing slow functions using historical data.

Getting Started with Profiling

Step 1: Enable Profiling

clang -O2 -fprofile-instr-generate -fcoverage-mapping -o myprogram myprogram.c

Step 2: Run Your Program

./myprogram

Step 3: Analyze Results

llvm-profdata-15 merge default.profraw -o myprofile.prof

Core Profiling Tools

llvm-profdata

Merge raw profiling data files into a single profile summary.

View documentation

llvm-cov

Generate test coverage reports in HTML or XML formats.

View documentation

perf

Linux performance counters for detailed CPU and memory analysis.

View documentation

Ready to Optimize Your Code?

Start profiling with LLVM's state-of-the-art analysis tools today.

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