jitwatch - Log analyser / visualiser for Java HotSpot JIT compiler

•    Java

Visualisation of JIT behaviour

pprof - pprof is a tool for visualization and analysis of profiling data

•    Go

pprof is a tool for visualization and analysis of profiling data.pprof reads a collection of profiling samples in profile.proto format and generates reports to visualize and help analyze the data. It can generate both text and graphical reports (through the use of the dot visualization package).

HeapInspector-for-iOS - Find memory issues & leaks in your iOS app without instruments

•    Objective-C

HeapInspector is a debug tool that monitors the memory heap with backtrace recording in your iOS app. You can discover memory leaks, no longer used objects, abandoned memory and more issues directly on your device without ever starting Instruments. Since ARC has been introduced we don't need to manage the retain & release anymore. ARC is very powerful and makes Objective-C more stable. ARC decreased the number of crashes and improves the memory footprint. ARC is technically doing a powerful job. It knows when to retain, autorelease and release. But ARC doesn't think about the overall architecture how to design for low memory usage. You should be aware that you can still do a lot of things wrong with your memory (even with ARC). You can still get memory pressures or peaks with ARC.

lighthouse - Auditing, performance metrics, and best practices for Progressive Web Apps

•    Javascript

Lighthouse analyzes web apps and web pages, collecting modern performance metrics and insights on developer best practices. Lighthouse is integrated directly into the Chrome Developer Tools, under the "Audits" panel.

py-spy - Sampling profiler for Python programs

•    Rust

Py-Spy is a sampling profiler for Python programs. It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. Py-Spy is extremely low overhead: it is written in Rust for speed and doesn't run in the same process as the profiled Python program, nor does it interrupt the running program in any way. This means Py-Spy is safe to use against production Python code. Py-Spy works on Linux, OSX and Windows, and supports profiling all recent versions of the CPython interpreter (versions 2.3-2.7 and 3.3-3.7).

MTHawkeye - Profiling / Debugging assist tools for iOS

•    Objective-C

MTHawkeye is profiling, debugging tools for iOS used in Meitu. It's designed to help iOS developers improve development productivity and assist in optimizing the App performance. During the App product development cycle, we introduced MTHawkeye to help us discover, find, analyze, locate, and solve problems faster.

fgprof - 🚀 fgprof is a sampling Go profiler that allows you to analyze On-CPU as well as Off-CPU (e

•    Go

fgprof is a sampling Go profiler that allows you to analyze On-CPU as well as Off-CPU (e.g. I/O) time together. Go's builtin sampling CPU profiler can only show On-CPU time, but it's better than fgprof at that. Go also includes tracing profilers that can analyze I/O, but they can't be combined with the CPU profiler.

easyloggingpp - Single header C++ logging library

•    C++

Single header C++ logging library. It is extremely powerful, extendable, light-weight, fast performing, thread and type safe and consists of many built-in features. It provides ability to write logs in your own customized format. It also provide support for logging your classes, third-party libraries, STL and third-party containers etc.

perfview - PerfView is a CPU and memory performance-analysis tool

•    CSharp

PerfView is a free performance-analysis tool that helps isolate CPU and memory-related performance issues. It is a Windows tool, but it also has some support for analyzing data collected on Linux machines. It works for a wide variety of scenarios, but has a number of special features for investigating performance issues in code written for the .NET runtime.If you are unfamiliar with PerfView, there are PerfView video tutorials. Also, Vance Morrison's blog gives overview and getting started information.

honest-profiler - A sampling JVM profiler without the safepoint sample bias

•    Java

A sampling JVM profiler without the safepoint sample bias

likwid - Performance monitoring and benchmarking suite

•    C

Likwid is a simple to install and use toolsuite of command line applications for performance oriented programmers. It works for Intel and AMD processors on the Linux operating system.For further information please take a look at the Wiki.

why-did-you-update - :boom: Puts your console on blast when React is making unnecessary updates.

•    Javascript

Why did you update is a function that monkey patches React and notifies you in the console when potentially unnecessary re-renders occur. This library is available on npm, install it with: npm install --save why-did-you-update or yarn add why-did-you-update.

hotspot - The Linux perf GUI for performance analysis.

•    C++

This project is a KDAB R&D effort to create a standalone GUI for performance data. As the first goal, we want to provide a UI like KCachegrind around Linux perf. Looking ahead, we intend to support various other performance data formats under this umbrella. The main feature of hotspot is visualizing a perf.data file graphically.

import-cost - displays the import size of the package you are importing inside the code editor

•    Javascript

This extension will display inline in the editor the size of the imported package. The extension utilizes webpack with babili-webpack-plugin in order to detect the imported size. In this project we use lerna for managing the multiple packages.

inspectIT - inspectIT is the leading Open Source APM (Application Performance Management) tool for analyzing your Java (EE) applications

•    Java

inspectIT is an open source APM (Application Performance Management) tool for analyzing Java (EE) applications. inspectIT is the leading Open Source APM (application performance management) tool for monitoring and analyzing your Java(EE) software applications.

Bootchart - Boot Process Performance Visualization

•    Java

Bootchart is a tool for performance analysis and visualization of the GNU/Linux boot process. Resource utilization data and process information are collected during the boot process and can later be displayed in a PNG, SVG or EPS chart.

Performance Analysis of Logs (PAL) Tool

Ever have a performance problem, but don't know what performance counters to collect or how to analyze them? The PAL (Performance Analysis of Logs) tool is a powerful tool that reads in a performance monitor counter log and analyzes it using known thresholds.

jHiccup - JVM Instrumentation Tool

•    Java

jHiccup is a non-intrusive instrumentation tool that logs and records platform "hiccups" - including the JVM stalls that often happen when Java applications are executed and/or any OS or hardware platform noise that may cause the running application to not be continuously runnable.

WatchdogInspector - Shows your current framerate (fps) in the status bar of your iOS app

•    Shell

WatchdogInspector counts your app's framerate and displays the fps in the status bar. The coloured status bar lets you know when your framerate drops below 60 fps. If everything is fine your status bar gets happy and will stay green. To detect unwanted main thread stalls you can set a custom watchdog timeout. and run pod install You can see the example project how to setup and run WatchdogInspector Make sure that you don't use WatchdogInspector in production.

coz - Coz: Causal Profiling

•    C++

Coz is a new kind of profiler that unlocks optimization opportunities missed by traditional profilers. Coz employs a novel technique we call causal profiling that measures optimization potential. This measurement matches developers' assumptions about profilers: that optimizing highly-ranked code will have the greatest impact on performance. Causal profiling measures optimization potential for serial, parallel, and asynchronous programs without instrumentation of special handling for library calls and concurrency primitives. Instead, a causal profiler uses performance experiments to predict the effect of optimizations. This allows the profiler to establish causality: "optimizing function X will have effect Y," exactly the measurement developers had assumed they were getting all along. Full details of Coz are available in our paper, Coz: Finding Code that Counts with Causal Profiling (pdf), SOSP 2015, October 2015 (recipient of a Best Paper Award).