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test Object#hash
Object.prototype.hash1 = function(string) {
var code = "try{ return this."+ string +" } catch(e){ return undefined }"
return (new Function(code)).call(this);
};
var test = {
'a':{
'b':{
'c':{
'd':10
}
}
}
}
console.time("Object#hash new Function")
console.log(test.hash1('a.b.c.d'));
for (var i = 0; i < 100000; i++) { // 10w 次
test.hash1('a.b.c.d')
};
console.timeEnd("Object#hash new Function")
Object.prototype.hash2 = function(str) {
// hash()
if(!str) return this;
if(typeof str === 'string')
str = str.split('.')
var ret = this[str[0]];
if(str.length === 1){
return ret
}
else{
return ret
? ret.hash2(str.slice(1))
: ret
}
}
console.time("Object#hash recursive")
console.log(test.hash2('a.b.c.d'));
for (var i = 0; i < 100000; i++) { // 10w 次
test.hash2('a.b.c.d')
}
console.timeEnd("Object#hash recursive")
var ettr = require('ettr');
Object.prototype.hash3 = function(str) {
return ettr.get(this,str)
};
console.time("Object#hash ettr")
console.log(test.hash3('a.b.c.d'));
for (var i = 0; i < 100000; i++) { // 10w 次
test.hash3('a.b.c.d')
};
console.timeEnd("Object#hash ettr")
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