Info

Trying to improve toType function from this article.

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var toString = Object.prototype.toString;
    
    var toTypeOrig = function(obj) {
        return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase()
        }
        
        
        
    var toTypeOrigCompat = function(obj) {
        return obj == null ? '' + obj : ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase()
        }
        
        
        
    var toTypeProto = function(obj) {
        return toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase()
        }
        
        
        
    var toTypeProtoCompat = function(obj) {
        return obj == null ? '' + obj : toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase()
        }
  };
</script>

Test runner

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Java applet disabled.

var toType = toTypeOrig

toType(null)
toType(undefined)
toType(5)
toType({})
toType([])
toType(alert)

var toType = toTypeOrigCompat

toType(null)
toType(undefined)
toType(5)
toType({})
toType([])
toType(alert)

var toType = toTypeProto

toType(null)
toType(undefined)
toType(5)
toType({})
toType([])
toType(alert)

var toType = toTypeProtoCompat

toType(null)
toType(undefined)
toType(5)
toType({})
toType([])
toType(alert)

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