Open-source alternatives to V8 Profiler

🔥 single-command flamegraph profiling 🔥

Analyze computation-communication overlap in V3/R1.

jHiccup is a non-intrusive instrumentation tool that logs and records platform "hiccups" - including the JVM stalls that often happen when Java applications are executed and/or any OS or hardware platform noise that may cause the running application to not be continuously runnable.

中文版

v8-profiler-next provides node bindings for the v8 profiler.

Jaeger is a distributed tracing platform used for collecting, storing, and visualizing request flows across microservices. It identifies performance bottlenecks and errors by tracking requests as they move through multiple service boundaries. The system includes telemetry collectors, a multi-tenant backend, and a trace visualizer. The platform provides a multi-tenant tracing infrastructure that isolates data and queries by tenant to support shared environments. It supports standardized telemetry ingestion via the OpenTelemetry Protocol over gRPC and HTTP. To manage storage costs and overhead,

A sampling JVM profiler without the safepoint sample bias

Utilities for latency measurement and reporting

Blazing fast flame graph tool for V8 and Node 🔥

node-memwatch: Leak Detection and Heap Diffing for Node.JS

CPU & Memory Monitor, auto dump.

Simple profiling for Go

MCP server that channels JVM forensics into structured leak verdicts — for Claude Code.

JVM runtime execution analysis - finds hot code paths by frequency, not CPU time

thetool is a CLI tool to capture different cpu, memory and other profiles for your node app in Chrome DevTools friendly format

Cross-platform process cpu % and memory usage of a PID.

Generates flamegraphs with Node.js or in the browser.

⏱️ Notes and resources related to v8 and thus Node.js performance