GrandPerspective VS fast-cli

• Visualization
  GrandPerspective provides a visual representation of disk usage, allowing users to easily identify large files and folders at a glance through a treemap display.
• Open Source
  The software is open source, meaning it is free to use and its source code is accessible for modification and improvement by the community.
• User-Friendly
  The interface is simple and intuitive, making it easy for users of all levels of technical expertise to navigate and understand their disk usage.
• Customizable
  Users can customize the treemap view, including color schemes and block sizes, to better suit their preferences and needs.

Possible disadvantages

• Mac-Only
  GrandPerspective is available only for macOS, limiting its usage to Apple users and excluding those on Windows or Linux platforms.
• Basic Features
  While it provides excellent visualization, GrandPerspective lacks advanced features that are available in some paid disk usage analyzers.
• Performance Issues
  The application can struggle with performance when scanning particularly large disks or volumes, leading to longer loading times and potential crashes.
• Occasional Bugs
  As with many open-source projects, users may encounter occasional bugs or glitches that can impact the user experience.

• Speed
  Fast-cli provides quick and reliable speed test results by leveraging the fast.com service, which is backed by Netflix.
• Simplicity
  The tool is easy to use with a simple command-line interface, requiring minimal configuration to get started.
• Cross-Platform
  Fast-cli can run on multiple operating systems, including macOS, Linux, and Windows, making it versatile for different user environments.
• Open Source
  Being an open-source project allows anyone to inspect, modify, and contribute to the codebase, fostering community involvement.

Possible disadvantages

• Limited Features
  Fast-cli primarily focuses on download speed and lacks more detailed metrics like latency and upload speed, which may be important for some users.
• Dependence on Fast.com
  The tool relies on the fast.com service, which could limit its functionality if the service faces downtime or changes that affect compatibility.
• Lack of Detailed Reporting
  Unlike some other speed test tools, fast-cli doesn't provide extensive options for historical data tracking or detailed reporting.
• No Graphical User Interface
  As a command-line tool, it lacks a graphical user interface, which might not be suitable for users who prefer visual interfaces over text-based ones.

• DaisyDisk Alternatives: Free Disk Analyzers We've Actually Tested
  dissectmac.com · Feb 2026

  If you've been on Mac for 10+ years, you probably know GrandPerspective. It was the original treemap visualizer, and it's completely free under GPL.

• What is Disk Inventory X and Its Top Alternatives
  www.imymac.com · Feb 2022

  The main drawback of this tool is that it presents a lot of information which can be quite overwhelming to the user. It will not display an overview of your disks which contradicts its name. In summary,...

• What Is WinDirStat and Its Top Mac Alternatives
  www.imymac.com · Jan 2022

  GrandPerspective’s menu/toolbar contains all of the options the app offers. You can configure its settings easily even if you are a newbie Mac user. You just need to choose a folder you want to analyze. The app will...

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• Don't let your Mac's storage fill up

  Don't pay $10 for what you can get for free: https://github.com/RobinNaumann/disko, https://grandperspectiv.sourceforge.net/, https://www.derlien.com/, etc… Otherwise, this is good advice. My cousin, who isn't particularly computer... - Source: Hacker News / 6 months ago

• Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

  I simply run GrandPerspective (GUI app, https://grandperspectiv.sourceforge.net/), or dust (terminal app, https://github.com/bootandy/dust), to give me an idea of what is going on with disk usage. - Source: Hacker News / 8 months ago

• Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

  I’d recommend GrandPerspective:[1] it’s really good at displaying this sort of thing, has been around for over two decades, and the developer has managed to keep it to <5MB which is perfect when you’re running very low on space. [1]... - Source: Hacker News / 8 months ago

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• macOS Command-Line Tools You Might Not Know About

  There is also a CLI client for speedtest.net[1] and fast.com[2]! Not included with MacOS, of course, but nice to have around. [1] https://www.speedtest.net/apps/cli [2] - Source: Hacker News / over 3 years ago

• Poor forwarding performance between two WireGuard tunnels

  Ran command-line tests on the server for Fast.com using awesome fast-cli and SpeedTest.net CLI utility. Both showed 1 Gbps performance via wg1 tunnel from server to internet. Source: about 4 years ago

• App To Monitor For Slow Speed, Not Total Outage

  You could use something like fast-cli to get your speed, log it and the date/time to a file if it's too low, and sleep 5 minutes or whatever. Source: about 5 years ago