Run results for: String double reverse

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.62 Safari/537.36

Browser: Chrome 67

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Straight pass	515011.3 Ops/sec
Using std Array / String functions	139767.4 Ops/sec

Script Preparation code:

var str = 'olleH dlrow fo tpircsavaJ htiw srekooh ni a racecar';

function straightPass(s){
  var l = s.length;
  var buf = '',
  res = '';
  for(var i=0; i<l; i++){
    if(s[i] !== ' '){
      res += (buf + s[i]);
      buf = '';
      continue
    }
    buf = s[i]+buf;
    if(i == l-1) res += buf
  }

  return res;
}

function stdFunctions(s){
  var res=[]
  var arr=s.split(' ')
  
  for(var i in arr){
    var word = arr[i]
    var wordA= word.split('').reverse().join('')
    res.push(wordA)
  }

  return res.join(' ')
}

Tests:

Straight pass
straightPass(str);
Using std Array / String functions
stdFunctions(str)

Run results for: String double reverse

Two solutions of the simple problem: reverse each word in the line.

Straight pass

Using std Array / String functions