Fast header-only arena allocator

What it does

Fast header-only arena allocator. O(1) allocations, STL support, and no dependencies.

Fast header-only arena allocator. Contribute to gaailiunas/arena-alloc development by creating an account on GitHub.

A lightweight, high-performance memory arena allocator library for C and C++. # define ARENA_DYNAMIC_LOAD_FACTOR # define ARENA_DEFAULT_LOAD_FACTOR 1.5 # include < arena_alloc.h > # include < iostream > using namespace arena ; struct Test1 { Test1 () { std::cout << " ctor 1 " << std::endl; } ~Test1 () { std::cout << " dtor 1 " << std::endl; } }; struct Test2 { int _a, _b; Test2 ( int a, int b) { _a = a; _b = b; std::cout << " ctor 2: " << _a << " " << _b << std::endl; } ~Test2 () { std::cout << " dtor 2: " << _a << " " << _b << std::endl; } }; int main ( void ) { // Arena arena(1024 * 2); // 2 KB (mem space is allocated on the heap) char mem[ 1024 * 2 ]; // 2 KB Arena arena (mem, sizeof…from github.com

• 
  Browser ArenaApr 2026 · browserarena.ai · ▲175

  Open-source benchmarks for cloud browser infrastructure

• 
  A pure C89 implementation of Go channels, with blocking selects2023 · github.com · ▲271

  A pure C (-std=c89) implementation of Go channels, including blocking and non-blocking selects. - GitHub - rochus-keller/CspChan: A pure C (-std=c89) implementation of Go channels, including blocking and non-blocking selects.

• 
  A header only C++11 LRU Cache template class, with no dependencies2016 · github.com · ▲29

  A header only C++11 LRU Cache template class that allows you to define key, value and optionally the Map type. uses a double linked list and a std::unordered_map style container to provide fast insert, delete and update No dependencies other than the C++ standard library. This is a C++11 remake of m

• 
  I wrote a minimal memory allocator in CNov 2025 · github.com · ▲137

  A fun toy memory allocator (not thread safe, that's a future TODO). I also wanted to explain how I approached it, so I also wrote a tutorial blog post (~20 minute read) covering the code which you can find the link to in the README.

• 
  MCP-stama – An ultra-fast Rust MCP server with no dependenciesAug 2026 · github.com · ▲73

  An ultra-fast, single-binary MCP server written in Rust as a lightweight alternative to Node.js/Python. - StamManif/mcp-stama

• 
  Drogon – A C++14/17 based high performance HTTP application framework2019 · github.com · ▲189

  Drogon: A C++14/17/20 based HTTP web application framework running on Linux/macOS/Unix/Windows - drogonframework/drogon

• 
  Run full iOS 16.5 firmware on Android Devices▲515

  Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.

  Dev tools · 1d ago · github.com

• 
  /dev/null▲492

  a social network for devs

  Dev tools · 5d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 29d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 25d ago · openbot.run

• 
  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 22d ago · talanoa.email

• IM
  I'm an airline pilot – I built interactive graphs/globes of my flights▲1,539

  Hey HN! Pilots everywhere are required to keep a logbook of all their flying hours, aircraft, airports, and so on. Since I track everything digitally (some people still just use paper logbooks!), I put together some data visualizations and a few 3D globes to show my flying history. This globe is probably my favourite so far: https:&#x2F;&#x2F;jameshard.ing&#x2F;pilot&#x2F;globes&#x2F;all If you’ve got ideas for other graphs or ways to show this kind of data, I’d love to hear them!

  Life & fun · 2025 · jameshard.ing

• 
  Chronicle: Cursor for Slides▲1,212

  Stunning presentations with AI. No design skills required.

  AI · 2025 · chroniclehq.com

• 
  Bubble for native mobile apps (beta)▲1,026

  Build native mobile apps for iOS and Android without code.

  Dev tools · 2025 · bble.io

• 
  Twenty▲989

  Build your Enterprise CRM with an AI-friendly SDK

  Dev tools · 2025 · twenty.com

• 
  Pally - AI Relationship Management▲949

  All your connections, across all your socials.

  AI · 2025 · pally.com

• 
  Workout.cool – Open-source fitness coaching platform▲827

  I was the main contributor to workout.lol, an open-source fitness app to easily build a workout routine. The project had traction (1.4k GitHub stars, 95 forks, ~20K visits&#x2F;month), but was eventually sold due to video licensing hurdles. The new owner stopped maintaining it, and the repo went abandoned. Over the next 9 months, I sent 15 emails to try to save it : no replies. Feature requests & issues were ignored. The community was left with a "broken" tool let's say. I couldn't just let it die So I built the new version from scratch with the same open-source spirit, but a better…

  Dev tools · 2025 · github.com