CATEGORY
Development tools::Profiling 882 crates
Data as of 2026-07-25 (crates.io database dump, timestamp 2026-07-25T02:00:36Z). Source: crates.io · db-dump.tar.gz · methodology & corrections.
llm-observatory-collectorOpenTelemetry collector with LLM-specific processors for LLM Observatory43Apache-2.0
owiwiA library to initialize tracing with opentelemetry43MPL-2.0
zbenchCompare command performance using Linux hardware counters (Linux-only)43MIT
ninjatracingRust port of ninjatracing: converts Ninja build logs to Chrome Tracing format42Apache-2.0
llm-observatory-sdkRust SDK for LLM Observatory with trait-based instrumentation42Apache-2.0
ratatui-guardianRender Budget Guardian — frame budget tracking and waste detection for ratatui TUI apps41MIT
aatxe-coreCore types, statistics, and comparison logic for aatxe. No IO.41MIT
llm-observatory-storageStorage layer for LLM Observatory - handles persistence of traces, metrics, and logs40Apache-2.0
ferroalloc-probeMemory allocation probe for the ferroalloc VS Code extension40MIT
perflab-metricsThin OpenTelemetry wrapper encoding PerfLab run-telemetry conventions (run lifecycle + OTLP/JSON export).40MIT
racewayOfficial Rust SDK for Raceway - race condition detection and distributed tracing39MIT
rustyloadA blazingly fast, concurrent HTTP load testing tool built in Rust39MIT
llm-latency-lens-exportersExport formats for LLM Latency Lens metrics39Apache-2.0
darwin-kperf-criterionCriterion measurement plugin using Apple's hardware performance counters39MIT OR Apache-2.0
megafineA multithreaded command-line benchmarking tool38GPL-3.0-or-later
subms-otelOpenTelemetry bridge for the subms perf-harness - wires Histogram + Span emission from SubMsObserver + SubMsBenchSummary +…36MIT OR Apache-2.0
oxigeo-dev-toolsDevelopment tools for OxiGeo: profiling, debugging, validation, and testing utilities34Apache-2.0
oxigeo-benchComprehensive performance profiling and benchmarking suite for OxiGeo34Apache-2.0
hardy-otelOpenTelemetry integration for Hardy DTN components34Apache-2.0
impatienceA library for instrumentation of event-to-event latency over a network34GPL-3.0
mcp-logger通用的 MCP 日志库，支持文件输出和 MCP 客户端转发33MIT
oxigeo-observabilityOpenTelemetry-based observability, monitoring, and alerting for OxiGeo32Apache-2.0
cirious_codex_metricsMetrics collection, aggregation, and visualization utilities for the Cirious ecosystem.30MIT OR Apache-2.0
qr_benchmarkA benchmarking suite for Rust QR code decoding libraries29MIT
turbobenchMCP server benchmarking proxy — measure latency, token usage, and compare MCP servers29MIT
dropclockA guard type that runs a closure with the creation instant on drop28MIT OR Apache-2.0
rakka-dashboardLive web UI over a running rakka system — REST + WebSocket + embedded React SPA, Prometheus / OTLP exporters.28Apache-2.0
hardware-diagnosticFerramenta de diagnóstico de hardware para Windows com sistema de pontuação27GPL-3.0-or-later
perl-parser-benchBenchmark binary for the perl-parser v3 native Perl parser27MIT OR Apache-2.0
prometheus-extensionsPrometheus extensions: AggregateCounter (per-label + total metrics), scientific-notation encoder, and EMA sensor.27MIT OR Apache-2.0
sideseatAI Development Workbench — Debug, trace, and understand your AI agents26MIT
loust-llm-mempipeCompile noisy LLM exports (ChatGPT, Claude, Gemini) into token-efficient JSONL + Markdown for Claude Code, Projects, and agent…26Apache-2.0
buswatch-sdkInstrumentation SDK for emitting message bus metrics to buswatch26Apache-2.0
buswatch-adaptersPre-built adapters for collecting metrics from popular message buses26Apache-2.0
observe-rsA flexible, multi-backend observability library for Rust25MIT
sqlRedisBenchA TUI tool to benchmark and compare SQLite (disk/memory) and Redis performance.25GPL-3.0-only
latrA lightweight, low-overhead span-based latency profiler for Rust.25MIT OR Apache-2.0
iro-cuda-ffi-profileGPU profiling and benchmarking utilities for iro-cuda-ffi25MIT
rustopsLightweight anomaly detection for operations metrics24MIT OR Apache-2.0
aatxe-benchAuthoring API + JSON emitter for aatxe-compatible Rust benchmarks24MIT
xct2cliLibrary and CLI for transforming Xcode Instruments .trace bundles (hotspots, callgraphs, annotated disassembly, PMI counters,…24MIT OR Apache-2.0
symbioticHigh-resolution performance profiling with hardware PMU counters, eBPF, and tracing integration23MIT OR Apache-2.0
metrA lightweight, low-overhead metrics and span instrumentation crate for Rust with composable sinks.23MIT OR Apache-2.0
elara-benchELARA Protocol - Production-grade benchmark suite with criterion for statistical analysis23MIT OR Apache-2.0
spectracostAI cost observability SDK - see the full spectrum of your AI spend22MIT
honeycomb-rsA minimal, security-focused Honeycomb.io client for Rust22MIT OR Apache-2.0
jazz-wasm-tracingTracing subscriber for WebAssembly. Maintained fork of tracing-wasm.22MIT OR Apache-2.0
textfile-metricsNon-blocking Prometheus textfile metrics writer with Counter and Gauge helpers22MIT
otel-rsModern OpenTelemetry observability helpers for Rust22MIT OR Apache-2.0
gpu-histopHigh-resolution GPU history monitor for NVIDIA, AMDGPU, and Apple Silicon21MIT
ferroalloc-analyzerAllocation aggregator and HTTP API server for the ferroalloc VS Code extension21MIT
calltrace-rsHigh-performance function call tracing library for C/C++ applications using GCC instrumentation with Rust safety guarantees21MIT OR Apache-2.0
agentprofCommand-line alias for agentpprof, a pprof-style semantic profiler for local AI coding-agent sessions20MIT
submillsStandard performance benchmarking for Rust programs, with reporting hooks for submillisecond.com cookbook samples.19MIT OR Apache-2.0
iqdb-evalBenchmarking and evaluation: recall@k, latency, and throughput for vector indexes - part of the iQDB family.19Apache-2.0 OR MIT
balanceAdaptive benchmark harness19GPL-3.0-only
subms-cookbookShared base library for submillisecond.com cookbook recipes: Recipe trait, bench params, and helpers that drive the subms…19MIT OR Apache-2.0
dyniak-benchLoad-generation and benchmarking tool with Riak PBC, Redis (RESP-2), and HTTP drivers19Apache-2.0
kisekiA Rust crate for programmatically producing Kanata-format processor pipeline traces, compatible with the Konata visualizer.19Apache-2.0
cargo-slowCargo subcommand to diagnose a slow machine: identify disk, memory, CPU, and thermal issues19MIT
malloc-bench-rsPortable, 100% Rust, generic-over-GlobalAlloc multi-threaded allocator benchmark harness (larson + mstress workloads with…19MIT OR Apache-2.0
captrack-pgoProfile-guided capacity optimization for Rust collections — measure with dhat or captrack, propose data-driven…19MIT OR Apache-2.0
bloclawdLive cohort percentiles for Claude Code and Codex rate limits — see where Pro, Max5, and Max20 caps actually fire and how they…18MIT OR Apache-2.0
martianbookTransform ordinary Rust codebases into explainable execution artifacts.18MIT
agenttraceCost + latency aggregation for LLM agent runs. Group calls into named runs, get totals, p50/p95, and per-model breakdowns.…18MIT
rprofProcess resource profiler — captures CPU and memory usage of a child process and renders charts in a browser.18MIT
ftestA set of declarative macros designed to simplify the declaration of unit tests and benchmarks in Rust18MIT OR Apache-2.0
rok-coderok-code: Rust-native AI coding agent with TUI, tools, and plugin system17MIT
metrics-exporter-sentry-v2A metrics-rs Recorder that ships metrics to Sentry's trace_metric envelope endpoint (the new, trace-connected metrics product).17MIT OR Apache-2.0
kobold-benchBenchmark harness for the gnucobol-rs hot path (cob_move COMP-3 <-> display) and kobold-data-shim record decode, with a parity…17Apache-2.0
assayist-contractTyped producer-side model of the Assayist metric contract17Apache-2.0
polytraceDeterministic cross-language (Python/Rust) causal profiler: cross-language flamegraphs, Python↔native boundary cost,…17MIT
agentqosOfficial Eunomia AgentQoS CLI for checking AI agent latency, error, token, and tool-call QoS gates.17MIT
bench-trackerBenchmark regression tracking tool for TensorLogic16Apache-2.0
assayist-otlpOTLP export/import for the Assayist contract16Apache-2.0
buildlineOne timeline for your whole build, no matter how many build systems it's made of.16MIT OR Apache-2.0
benchoraModern benchmarking + xDD testing framework for Rust15MIT
hprof-analyzerFast, low-memory Java HPROF heap-dump analyzer with Eclipse MAT-parity reports (System Overview, Leak Suspects, Top Consumers).15MIT
rustscope-cliUnified Rust performance profiler CLI15MIT
assayist-gateDecision gate for Assayist: permutation A/B, longitudinal drift, subsystem triad13Apache-2.0
assayist-capture-residentSnapshot residency capture (mincore on the mem file) for Assayist13Apache-2.0
assayistAssayist orchestrator: run benchmark defs, capture, assemble AssayRuns, gate13Apache-2.0