sampling-profiler

A sampling profiler or a memory usage profiler for PHP written in PHP, which reads information about running PHP VM from outside the process. You can find performance bottlenecks or memory leaks of your scripts without changing the target script or loading extensions.

Omnitrace: Application Profiling, Tracing, and Analysis

Fast poor man's profiler for Linux

Simple sampling profiler based on ETW and DbgHelp.

sampling profiler for PostgreSQL

What Are You Doing? - low-effort time tracking

Stop guessing, measure. JitProfiler is an engine-native LuaJIT sampling profiler for STALKER Anomaly: one capture covers the whole modpack and names the mod behind each hot script. CPU, memory, GC, instrumentation, and callbacks profiling; SpeedScope flamegraphs; engine-C entry points mapped for Optick. Low-overhead, save-safe.

A sampling profiler for Go that reports where wall-clock time went, as a readable call tree

A sampling profiler for operations too short for a stack profiler to see: labels in a thread-local slot, read by a sampling thread, with a measured bound on the error of every share.

Header-only async-signal-safe SPSC sampling profiler (SIGPROF, mmap+mlock, 4096 slots)