Run results for: Array join and let unique values in return v2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Safari/605.1.15

Browser: Safari 14

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
c	458.4 Ops/sec
D	6.7 Ops/sec
E	5118945.0 Ops/sec

Script Preparation code:

var a1 = [...Array(10000)].map((x, i) => ["Vijendra", "Singh", "ab", "cd", "ef", "gh", "ij", "kl", "mn", "op"][i % 10]);
var a2 = [...Array(10000)].map((x, i) => ["Singh", "Shakya", "ab", "cd", "zz", "xx", "ij", "kl", "AA", "BB"][i % 10]);
function K(arr1,arr2) {
  let r=[], h={};
  
  while(arr1.length) {
    let e = arr1.shift();
    if(!h[e]) h[e]=1 && r.push(e);
  }
  
  while(arr2.length) {
    let e = arr2.shift();
    if(!h[e]) h[e]=1 && r.push(e);
  }
  
  return r;
}

Tests:

c
return new Set([...a1,...a2]);
D
c=a1.concat(a2); return c.filter((item, pos) => c.indexOf(item) === pos);
E
return K(a1,a2);

Run results for: Array join and let unique values in return v2

c

D

E