Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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OpenTelemetry JavaScript (@opentelemetry/api)
Vendor-neutral tracing, metrics, and context API that libraries and apps instrument once, so any OpenTelemetry-compatible backend can consume it.
Sentry for Laravel
Official Sentry SDK for Laravel with automatic error, log, and performance tracing capture
dd-trace
Datadog's official Node.js APM tracer, auto-instrumenting 100+ frameworks for tracing, profiling, security, and LLM observability.
fgprof
A sampling wall-clock profiler for Go that captures both On-CPU computation and Off-CPU waiting time in a single pprof-compatible profile.
dhat
Heap profiling, ad hoc profiling, and heap-usage testing for Rust programs, in the style of Valgrind's DHAT.
dd-trace-py
Datadog's official Python APM client for distributed tracing, profiling, and observability.
HdrHistogram (Rust)
A native Rust port of HdrHistogram for fast, high-dynamic-range recording and analysis of latency and value distributions.
jemalloc_pprof
Convert jemalloc heap profiles to pprof format for memory leak and OOM debugging
pyroscope-rs
Official Rust agent for Grafana Pyroscope, sampling CPU and memory and streaming pprof-encoded profiles to a Pyroscope server.
memory-stats
A cross-platform Rust crate that reads a process's physical and virtual memory usage with a single function call.
line_profiler
Line-by-line timing for Python functions via an @profile decorator and the kernprof runner.
SnakeViz
An in-browser viewer for Python cProfile data with interactive sunburst and icicle diagrams.
profiling
A thin, backend-agnostic abstraction over instrumented Rust profilers like Puffin, Optick, and Tracy.
XHProf
A hierarchical function-level profiler for PHP with a lightweight call-graph UI.
