test.js

const gpu1 = new GPU();
const createTexture = gpu1.createKernel(function() {
  return 55;
}).setOutput([4, 100, 100]).setOutputToTexture(true);
console.time('texture');
const texture1 = createTexture();
const texture2 = createTexture();
const texture3 = createTexture();
const useTexture = gpu1.createKernel(function() {
  var index = 0;
  return this.constants.textures[index][0];
}, {
  constants : {
    textures : [texture1, texture2, texture3]
  }
}).setOutput([4, 100, 100]);
const result = useTexture();
console.timeEnd('texture');
console.log(result);