Best Open-source Continuous Profiling tools

Perforator

Zero‑impact continuous CPU profiling for large‑scale Linux services

Parca

Continuous eBPF profiling for cost-effective performance insights

Scalene

Fast line‑level CPU, GPU, and memory profiling with AI suggestions

PerfView

Deep-dive performance analysis for .NET on Windows

System Informer

Powerful Windows tool for monitoring, debugging, and malware detection

Tracy Profiler

Nanosecond-resolution, real-time telemetry profiler for games and apps

Grafana Pyroscope

Intuitive, queryless UI for continuous application profiling

Likwid

Comprehensive CLI suite for low‑level CPU/GPU performance analysis

MTuner

Cross‑platform C/C++ memory profiler with time‑based history

py-spy

Zero‑overhead sampling profiler for live Python applications

VizTracer

Low-overhead Python tracer with interactive Perfetto visualizations

SPX

Lightweight self‑hosted PHP profiler with instant UI

Palanteer

Lean, high-resolution instrumentation for C++ and Python applications

fgprof

Unified wall‑clock profiler for Go applications with mixed I/O and CPU

Speedracer

Run, trace, and report JavaScript performance with Chrome