Perfmon

A terminal performance monitor that consolidates output from multiple diagnostic tools (top, vmstat, ss, netstat, etc.) into a single tabbed TUI. Built with Bubble Tea.

The main value over running those tools separately: a tabbed interface so you can switch between metrics without terminal clutter, plus live sparklines for load, CPU, memory, and network as an at-a-glance health bar.

Usage:

perfmon          # start with default system tools

Navigate with Tab/Shift+Tab between tabs, j/k to scroll output, t to toggle light/dark theme, q to quit.

Configuration via perfmon.toml (searched in $PERFMON_CONFIG, ~/.config/perfmon/config.toml, or current directory):

global_refresh_interval = "5s"

[[tab]]
title = "Process Explorer"
cmd = ["top", "-b", "-n", "1"]
refresh_interval = "2s"

[[tab]]
title = "Network Connections"
cmd = ["ss", "-tulpn"]

Each tab runs an arbitrary shell command and displays its output. You can add whatever diagnostic commands you want — it's just a configurable command runner with a nice display layer. Per-tab refresh intervals let you poll fast-changing metrics more frequently.

Cross-platform: ships with sensible defaults for both Linux and macOS (different commands for top, network stats, etc.).

Install: go install github.com/sumant1122/Perfmon@latest or grab a binary from releases.

Repo: https://github.com/sumant1122/Perfmon — 84 stars, MIT license.