blessed_is_slow.js

const blessed = require('blessed')
const colors = require('colors')

const screen = blessed.screen({
  smartCSR: true
})

let index = 0

const display = blessed.box({
    parent: screen,
    scrollable: true,
    alwaysScroll: true,
    left: 0,
    top: 0,
    width: "100%",
    height: "100%"
})

const add = ()=> {
    for (let j = 0; j < 20; j++) {
        let rand = Math.random().toString()

        display.pushLine(index + ': ' + rand.red + rand.green + rand.yellow + rand.blue)
        index++
    }

    display.setScrollPerc(100)
    screen.render()
}

screen.key('C-q', function() {
    process.exit(0)
})

screen.key('C-a', function() {
    add()
})

add()