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Get your app Performance score.
Flashlight is a Lighthouse-like tool for mobile apps.
No installation required.
Lighthouse for Mobile - audits your app and gives a performance score to your Android apps (native, React Native, Flutter..). Measure performance on CLI, E2E tests, CI...
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Make Windows Yours.
Open-source tool to build your Windows script from scratch.
It features debloat, privacy, performance & app installing scripts.
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VMM for native-performance sandboxing.
TinyKVM is a simple, slim and specialized userspace emulator library with native performance.
TinyKVM is designed to execute regular Linux programs and also excels at request-based workloads in high-performance HTTP caches and web servers.
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A high performance implementation of the Ruby programming language, built on GraalVM.
TruffleRuby is the GraalVM high-performance implementation of the Ruby programming language.
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Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
JSON is everywhere on the Internet. Servers spend a lot of time parsing it. The simdjson library uses commonly available SIMD instructions and microparallel algorithms to break speed records.
SQL Indexing and Tuning e-Book for developers.
Use The Index, Luke covers Oracle, MySQL, PostgreSQL, SQL Server, ...
A site explaining SQL indexing to developers—no crap about administration.
SQL indexing is the most effective tuning method—yet it is often neglected during development. Use The Index, Luke explains SQL indexing from grounds up and doesn’t stop at ORM tools like Hibernate.
A PostgreSQL assistant for developers
designed to help understand and optimize PostgreSQL database performance.
PgAssistant is an open-source tool designed to help developers understand and optimize their PostgreSQL database performance. It provides insights into database behavior, identifies schema-related issues, and assists in correcting them. Additionally, PgAssistant makes it easy to manage a library of specific SQL queries useful for your project through a simple JSON file.
Scan for React performance issues and eliminate slow renders in your app.
React Scan automatically detects performance issues in your React app.
CoolerControl is a feature-rich cooling device control application for Linux. It has a system daemon for background device management, as well as a GUI to expertly customize your settings.
CoolerControl depends on Hwmon kernel drivers and liquidctl to access and control supported hardware.
Profile-sync-daemon (psd) is a small pseudo-daemon designed to manage the
browser's profile in tmpfs and to periodically sync it back to the physical
disc (HDD/SSD).
It accomplishes this via a symlinking step and an innovative use of rsync to
maintain backup and synchronization between the two.
One of the major design goals of psd is a transparent user experience.
Auto-suspend inactive X11 applications. 
Save battery by auto-suspending unfocused X11 applications.
Modern GUI applications tend to use significant system resources, such as CPU time, even when they're not being actively used.
XSuspender configurably suspends application activity (using Unix signal SIGSTOP or a custom shell script) shortly after its window(s) loses focus. When the window regains focus, the application is transparently resumed exactly where it had left off.
MySQL Performance Tuning Tool.
PoWA is a PostgreSQL Workload Analyzer that gathers performance stats and
provides real-time charts and graphs to help monitor and tune your PostgreSQL
servers.
bpftune aims to provide lightweight, always-on auto-tuning of system behaviour. The key benefit it provides are
- by using BPF observability features, we can continuously monitor and adjust system behaviour.
- because we can observe system behaviour at a fine grain (rather than using coarse system-wide stats), we can tune at a finer grain too (individual socket policies, individual device policies etc).
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Scan for React performance issues and eliminate slow renders in your app.
React Scan "scans" your React app for problematic renders. It's just JavaScript, so you drop it in anywhere – script tag, npm, you name it!
Modern System Monitor for macOS. Monitor Your System With Style.
A beautiful, lightning-fast system monitor built with Rust and Svelte. Experience real-time performance monitoring like never before.
Configure Windows-based systems for a variety of tasks.
sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.
DISKSPD is a storage load generator / performance test tool from the Windows/Windows Server and Cloud Server Infrastructure Engineering teams.
PHP Benchmarking framework.
PHPBench is a benchmark runner for PHP analogous to PHPUnit but for performance rather than correctness.