Profiling

JVM Profilers & Performance Analysis Tools

When a Java service is slow, a profiler tells you where the CPU time and allocations actually go instead of wherever a hunch points. Modern JVM profiling has largely converged on two complementary techniques: sampled async profiling (async-profiler) and events recorded by the JVM itself (Java Flight Recorder).

This hub compares the practical options — from the free, bundled and open-source tools to the commercial IDEs — and links to real quick-starts for the ones that matter most.

What you'll find here: Start here with async-profiler for CPU & allocation flame graphs · Use Java Flight Recorder (JFR) for zero-overhead, always-on recording · Open JFR recordings and thread dumps in JDK Mission Control · Compare VisualVM, YourKit and IDE-integrated profilers

Profiling tools

async-profiler
The de-facto standard sampled profiler: low-overhead CPU and allocation profiling with flame graphs, usable directly or inside IntelliJ and your JFR workflow.
open-sourceApache-2.0
VisualVM
The bundled-style visual tool for profiling and monitoring local and remote JVMs: CPU/memory sampling, thread and heap dump viewing, and JFR/GC analysis.
open-sourceGPLv2 + CE
JDK Mission Control (JMC)
The rich client for analyzing JFR recordings and live JVMs: flame graphs, allocation and lock analysis, and GC pause views on top of Java Flight Recorder data.
open-sourceUPL-1.0 (open)
YourKit Java Profiler
A mature commercial profiler with deep allocation, lock, and JEE profiling plus out-of-the-box integrations; polished UI and low overhead.
commercialCommercial (licenses + free eval)
JProfiler
A long-standing commercial Java profiler known for its strong CPU, memory, and JDBC/HTTP call-tree analysis and offline profiling of recorded sessions.
commercialCommercial (licenses + free eval)
Arthas
Alibaba's widely used open-source JVM diagnostic tool: attach to a running JVM to watch method arguments/returns, find slow calls, detect CPU hotspots and hot methods without redeploying.
open-sourceApache-2.0
Micrometer
The vendor-neutral metrics facade: instrument your JVM app once and route to Prometheus, Datadog, New Relic, Graphite or dozens of other backends.
open-sourceApache-2.0
Prometheus JMX Exporter
Exposes JVM runtime metrics (heap, GC, threads, classes) as Prometheus metrics via a Java agent or standalone HTTP server; the standard bridge to Kubernetes monitoring.
open-sourceApache-2.0

In-depth guides in this category

async-profiler
async-profiler tutorial: install, profile CPU and allocations, dump flame graphs, convert to JFR, and use it inside IntelliJ IDEA on any JVM.
VisualVM
VisualVM tutorial: attach to local/remote JVMs, view heap and GC charts, take and open thread dumps, and do basic CPU/memory sampling.
JDK Mission Control (JMC)
JDK Mission Control tutorial: open and analyze JFR .jfr files, flame graphs, allocation, lock and GC pause views, and connect to live JVMs.