Functional Benchmarks

benchmark.js

const Benchmark = require("benchmark");
const Suite = new Benchmark.Suite();

const numColumns = 3;
const arr = Array(100).map((_, i) => i);

const testControl = (index) => {
  const ret = [];
  for (let kk = 0; kk < numColumns; kk++) {
    const item = data[index * numColumns + kk];
    if (item != null) {
      ret.push(item);
    }
  }
  return ret;
};

const testFiltery = (index) => {
  return arr
    .slice(index * numColumns, (index + 1) * numColumns)
    .filter((item) => item != null);
};

Suite.add("testFiltery", () => {
  arr.forEach(testFiltery);
})
  .add("testControl", () => {
    arr.forEach(testControl);
  })
  .on("cycle", (e) => {
    console.log(e.target.toString());
  })
  .run({ async: true });

output.txt

$ node index.js
testFiltery x 4,707,602 ops/sec ±0.13% (99 runs sampled)
testControl x 4,707,246 ops/sec ±0.10% (95 runs sampled)