sjansen/mecha

package main

import (
    "fmt"
    "os"

    "github.com/dustin/go-humanize"
    "github.com/shirou/gopsutil/v3/process"
)

func main() {
    pid := os.Getpid()
    proc, err := process.NewProcess(int32(pid))
    if err != nil {
        die(err)
    }

    for s := "0123456789"; len(s) <= 2000000; s += s {
        info, err := proc.MemoryInfo()
        if err != nil {
            die(err)
        }

        fmt.Printf("RSS: %v (%v)\n",
            humanize.IBytes(info.RSS),
            humanize.IBytes(uint64(len(s))),
        )
    }
}

func die(err error) {
    fmt.Fprintln(os.Stderr, err)
    os.Exit(1)
}