Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var l=[1,-1];
  };
</script>

Test runner

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for (var i in l) {
  var x = l[i] > 0 && 1 || 0
}

for (var i in l) {
  var x = (l[i] > 0) ? 1 : 0
}

for (var i in l) {
  var x = Math.max(l[i],0)
}

for (var i in l) {
  var x = .5 * (l[i] + 1)
}

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