async-profiler/async-profiler

Health v2 · maintenance only

Adoption not part of the score

9169 stars · 993 forks observed · 2026-10-20

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

A low-overhead sampling profiler for Java applications built on HotSpot's AsyncGetCallTrace API and Linux perf_events. It profiles CPU time, heap allocations, native memory, locks, and hardware counters without safepoint bias, producing flame graphs.

Use cases

• profile cpu usage of a running java process
• find memory allocation hotspots in a jvm application
• generate flame graphs from java stack traces
• detect native memory leaks in java
• profile contended locks in java services
• diagnose gc and jit compiler thread activity
• profile java apps without safepoint bias

When to choose

• you need low-overhead production profiling of JVM applications
• you want to see native, kernel, GC, and JIT frames alongside Java frames
• you need flame graphs or JFR output for performance analysis
• you profile allocations, locks, or hardware counters, not just CPU

When to avoid

• you need a GUI-based interactive profiler with visual stepping
• your application does not run on a HotSpot-based JVM
• you need profiling on platforms other than Linux or macOS
• you want source-level profiling of non-JVM languages only

Facets

cli-tool · maturity stable

monitoring tracing benchmarking developer-tools performance developer-tools monitoring jvm cli java-profiler flame-graph sampling-profiler heap-profiling jvm low-overhead linux macos

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