crypto模块Cipher使用AES256算法加密效率。

有时候我们会使用crypto模块对数据进行加密。比较经典的情形就是生产AccessToken.
今天就测试下Cipher使用AES256对于数据加密的效率。

生成accesstoken代码：

module.exports.generateAccessToken = function (content, callback) {
    var cipher = crypto.createCipher('aes256', '##wusp^&*15578899366');    //password is ##wusp^&*15578899366
    var encrypted = '';    
    cipher.on('readable', function () {
        var data = cipher.read();        
        if(data){
            encrypted += data.toString('hex');
        }    
    });    
    cipher.on('end', function () {    });
    cipher.write(content);    
    cipher.end();
};

循环生产10W条AccessToken代码：

var tokenManager = require('./tokenManager');
var date = new Date();
var startTime = date.getTime();
for(var i = 1; i < 100000; i++){
    tokenManager.generateAccessToken(JSON.stringify({name: 'wusp', age: '12', company: 'gxnews', uuid: 'd22f30b8-2716-41d2-84f2-4cd56bb75ecc', exp: ('2016-7-1' + i)}), function () {    });
}
date = new Date();
var endTime = date.getTime();
console.log('json using time: ' + (endTime - startTime));
date = new Date();
startTime = date.getTime();
for(i = 1; i < 100000; i++) {
    tokenManager.generateAccessToken('name=wusp, age=12, company=gxnews, uuid=d22f30b8-2716-41d2-84f2-4cd56bb75ecc, exp=2016-7-1' + i, function () {    });
}
date = new Date();
endTime = date.getTime();
console.log('string using time: ' + (endTime - startTime));

测试结果：
1. json using time: 5234
2. string using time: 4435