stdout.write performance improvements #617
Description
Here is a simple example to fill the terminal and move a space:
When running with tjs, the terminal will flicker, but nodejs will run smoothly. It is not clear whether it is a platform problem of Windows, or the implementation of console.clear is different from deno/node.
let width = 0
let height = 0
if (typeof tjs !== 'undefined') {
width = tjs.stdout.width
height = tjs.stdout.height
} else {
width = process.stdout.columns
height = process.stdout.rows
}
let log;
if (typeof tjs !== 'undefined') {
const encoder = new TextEncoder()
log = s => tjs.stdout.write(encoder.encode(s))
} else {
log = s => process.stdout.write(s)
}
let c = 0
const size = width * height
const sleep = n => new Promise(r => setTimeout(r, n));
(async function () {
while (c < size) {
console.clear()
const s = new Array(size).fill('x')
s[c] = ' '
log(s.join(''))
c++
await sleep(16)
}
})()
deno/console/clear
class CSI {
static kClear = "\x1b[1;1H";
static kClearScreenDown = "\x1b[0J";
}
clear = () => {
this.indentLevel = 0;
this.#printFunc(CSI.kClear, 1);
this.#printFunc(CSI.kClearScreenDown, 1);
};
I tried running snake game with txiki, and it had no functional issues except for the terminal flickering.
https://github.com/ahaoboy/r-tui-txiki/blob/main/src/snake.tsx