I see a 3x speedup using `putImageData`… by f8f82804

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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f8f82804

remix of d/12681 by u/f8f82804

function u(t) {

eval(unescape(escape`景爨椽ㅥ㐻椭ⴻ砮灵瑉浡来䑡瑡⠮⸮畛稽椥㉥㍝㴨畛穝籼孮敷⁉浡来䑡瑡⡕楮琸䍬慭灥摁牲慹⹯昨稯㠬〬戽爨⤪㈵㔬㈵㔩ⰱ⤬稬截㑝⤮浡瀨⡶ⱪ⤽㹪㽶⬲ⴴ⩲⠩㩶⤩⥲㵍慴栮牡湤潭`.replace(/u(..)/g,"$1%")))

Mar 7 2019 6:52 PM UTC

}// 127/140

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I see a 3x speedup using putImageData over fillRect

u/f8f82804

for(i=1e4;i--;x.putImageData(...u[z=i%2e3]=(u[z]||[new ImageData(Uint8ClampedArray.of(z/8,0,b=r()*255,255),1),z,b*4]).map((v,j)=>j?v+2-4*r():v)))r=Math.random


      u(t) is called 60 times per second.
      t: elapsed time in seconds.
      c: A 1920x1080 canvas.
      x: A 2D context for that canvas.
      S: Math.sin
      C: Math.cos
      T: Math.tan
      R: Generates rgba-strings, ex.: R(255, 255, 255, 0.5)

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