Best Open-source Continuous Profiling tools

Scalene

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

Parca

Continuous eBPF profiling for cost-effective performance insights

System Informer

Powerful Windows tool for monitoring, debugging, and malware detection

Perforator

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

Grafana Pyroscope

Intuitive, queryless UI for continuous application profiling

Tracy Profiler

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

VizTracer

Low-overhead Python tracer with interactive Perfetto visualizations

PerfView

Deep-dive performance analysis for .NET on Windows

Likwid

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

py-spy

Zero‑overhead sampling profiler for live Python applications

SPX

Lightweight self‑hosted PHP profiler with instant UI

MTuner

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

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