palindrome check benchmarks

index_test.js

import { assert } from "https://deno.land/[email protected]/testing/asserts.ts";
import {
  bench,
  runBenchmarks,
} from "https://deno.land/[email protected]/testing/bench.ts";

function isPalindromeSimple(s) {
  return s === s.split("").reverse().join("");
}

function isPalindromeLoop(s) {
  for (let i = 0; i < s.length / 2; i++) {
    if (s[i] !== s[s.length - i - 1]) {
      return false;
    }
  }
  return true;
}

Deno.test({
  name: "is palindrome - simple",
  async fn() {
    assert(isPalindromeSimple("laval"));
    assert(isPalindromeSimple("abba"));
    assert(!isPalindromeSimple("abcd"));
    assert(!isPalindromeSimple("abcde"));
  }
});

Deno.test({
  name: "is palindrome - loop",
  async fn() {
    assert(isPalindromeLoop("laval"));
    assert(isPalindromeLoop("abba"));
    assert(!isPalindromeLoop("abcd"));
    assert(!isPalindromeLoop("abcde"));
  }
});

bench({
  name: "is palindrome - simple",
  runs: 1000,
  func(b) {
    b.start();
    for (let i = 0; i < 1e5; i++) {
      isPalindromeSimple("lalalalalalalalalalalalalalalalalalalalalalalalalal");
    }
    b.stop();
  },
});

bench({
  name: "is palindrome - loop",
  runs: 1000,
  func(b) {
    b.start();
    for (let i = 0; i < 1e5; i++) {
      isPalindromeLoop("lalalalalalalalalalalalalalalalalalalalalalalalalal");
    }
    b.stop();
  },
});

runBenchmarks();