Dev tools · alternatives · 2026

24 alternatives to Lag Radar Chrome Extension from Dan Abramov's Beyond React 16 Demo

BECAUSE PERFORMANCE SHOULD BE SEXY. Contribute to swyxio/async-render-toolbox development by creating an account on GitHub.

Lag Radar is a Chrome extension that visualizes performance issues in web applications. Built as a demo from Dan Abramov's Beyond React 16 presentation, it helps developers identify rendering delays and stuttering by… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Lag Radar Chrome Extension from Dan Abramov's Beyond React 16 Demo launched in 2018; newer entries below may have overtaken it.

1. 1
   Lighthouse 8.0▲330

   Analyze web apps & sites, collect modern performance metrics

   2021 · developer.chrome.com · its alternatives →

2. 2
   Next.js 16▲417

   Performance results of AI coding agents on Next.js

   Oct 2025 · nextjs.org · its alternatives →

3. 3
   SpeedVitals▲829

   Hi HN, I’m Kashish, one of the co-founders of SpeedVitals, a platform for testing & monitoring website performance with a major emphasis on Core Web Vitals. Until now, our platform has only focused on Synthetic/Lab testing, such as Lighthouse tests and TTFB tests. But now, we have developed a Real-User Monitoring platform that doubles up as a Web Analytics tool. One major feature we have that most RUM tools lack is Performance Audits. Just like Lighthouse audits work on Lab test data, our audits work across all the real-user visits and gives suggestions on what task to prioritize first.…

   2023 · speedvitals.com · its alternatives →

4. 4
   ChartGPU – WebGPU-powered charting library (1M points at 60fps)▲670

   Creator here. I built ChartGPU because I kept hitting the same wall: charting libraries that claim to be "fast" but choke past 100K data points. The core insight: Canvas2D is fundamentally CPU-bound. Even WebGL chart libraries still do most computation on the CPU. So I moved everything to the GPU via WebGPU: - LTTB downsampling runs as a compute shader - Hit-testing for tooltips/hover is GPU-accelerated - Rendering uses instanced draws (one draw call per series) The result: 1M points at 60fps with smooth zoom/pan. Live demo:…

   Jan 2026 · github.com · its alternatives →

5. 5RG
   React Geiger – performance profiling using sound▲164

   2024 · its alternatives →

6. 6
   Apex Ping▲303

   Uptime & performance monitoring for websites and APIs

   2016 · its alternatives →

7. 7RT
   Real-Time 3D Gaussian Splatting in WebGL▲309

   2023 · antimatter15.com · its alternatives →

8. 8
   An open source performance monitoring tool▲135

   Hey HN. We’re Jay and Vadim from Highlight.io (https://highlight.io). We’re building an open source [1] monitoring platform for web applications. Today we’re excited to be sharing a performance tool we’ve been working on, which helps you inspect the latency of code execution from the client to the server. As engineers at past startups, we often had to debug slow queries, poor load times, inconsistent errors, etc... While tools like Jaegar [2] helped us inspect server-side performance, we had no way to tie user events to the traces we were inspecting. In other words, although we had…

   2024 · github.com · its alternatives →

9. 9IB
   I built an internet speed analytics tool▲89

   Senior full stack software engineer with 8+ years shipping production systems in React, Node.js, Python, and Rails. Previously a Product Engineer at Ghost. Based in South Korea.

   2021 · ronaldlangeveld.com · its alternatives →

10. 10
    React Scan▲385

    Scan your React app for problematic renders and performance

    2024 · react-scan.com · its alternatives →

11. 11
    Radar▲397

    The missing open-source Kubernetes UI

    May 2026 · radarhq.io · its alternatives →

12. 12
    React-RPM – Chrome DevTool for Real-Time Performance Metrics▲14

    2017 · chrome.google.com · its alternatives →

13. 13
    Radar▲333

    Location data infrastructure

    2017 · radar.io · its alternatives →

14. 14
    30ms latency screen sharing in Rust▲353

    CLI Native WebRTC Agent in Rust. Contribute to bitwhip/bitwhip development by creating an account on GitHub.

    2024 · github.com · its alternatives →

15. 15
    Radar by Meshed Labs▲83

    Intercept malicious transactions before you get scammed

    2022 · getradar.xyz · its alternatives →

16. 16RT
    Real-time server monitoring in your browser▲346

    2014 · scoutapp.github.io · its alternatives →

17. 17OI
    OpenGL in super slow motion – visualising Z-buffering▲276

    Things orbital and not.

    2016 · orbides.org · its alternatives →

18. 18DC
    detecting cache latency inside a Web browser▲107

    2018 · maratyszcza.github.io · its alternatives →

19. 19
    Get Rails performance metrics into Chrome Dev Tools▲136

    Bring Rails server-side performance metrics 📈 to Chrome's Developer Tools via the Server Timing API. Production Safe™. - scoutapp/ruby_server_timing

    2018 · github.com · its alternatives →

20. 20
    NODUS PH Radar for Product Hunt▲103

    Product Hunt analytics beyond the daily leaderboard

    Jun 2026 · nodus-ai.app · its alternatives →

21. 21
    Radar▲114

    Generate and track keyword rankings

    2025 · apps.apple.com · its alternatives →

22. 22
    All You Can Optimize on Your Website in a Single Report▲65

    {{Page.description() ||

    2015 · dareboost.com · its alternatives →

23. 23
    A Chrome extension that tracks front-end JavaScript at runtime▲95

    A chrome extension tracks front-end JavaScript that uses DOM / jQuery APIs to manipulate html dom elements (e.g., change style, attach event listener) at runtime. - pilagod/js-tracker

    2018 · github.com · its alternatives →

24. 24
    F19n Obtrusive Livetest▲82

    Frontend Performance Analysis Tool for Chrome

    2018 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →