Async Profiler for Java

Async-profiler is a low overhead sampling profiler for Java that produces nice flamegraphs to quickly see where CPU-cycles are eaten (event=cpu). It’s nice that it also shows where cycles are eaten in native code and is not biased twoards your application byte-code. It also allows to analyze heap allocations (event=alloc).

You can either attach it to an already running Java application or use an agent to to attach it on startup.