node-imap-2/deps/iconv-lite/test/performance.js

var iconv = require('iconv');
var iconv_lite = require("../index");

var encoding = process.argv[2] || "windows-1251";
var convertTimes = 10000;

var encodingStrings = {
    'windows-1251': 'This is a test string 32 chars..',
    'gbk':          '这是中文字符测试。。！@￥%12',
    'utf8': '这是中文字符测试。。！@￥%12This is a test string 48 chars..',
};
// Test encoding.
var str = encodingStrings[encoding];
if (!str) {
    throw new Error('Don\'t support ' + encoding + ' performance test.');
}
for (var i = 0; i < 13; i++) {
    str = str + str;
}

console.log('\n' + encoding + ' charset performance test:');
console.log("\nEncoding "+str.length+" chars "+convertTimes+" times:");

var start = Date.now();
var converter = new iconv.Iconv("utf8", encoding);
for (var i = 0; i < convertTimes; i++) {
    var b = converter.convert(str);
}
var duration = Date.now() - start;
var mbs = convertTimes*b.length/duration/1024;

console.log("iconv: "+duration+"ms, "+mbs.toFixed(2)+" Mb/s.");

var start = Date.now();
for (var i = 0; i < convertTimes; i++) {
    var b = iconv_lite.encode(str, encoding);
}
var duration = Date.now() - start;
var mbs = convertTimes*b.length/duration/1024;

console.log("iconv-lite: "+duration+"ms, "+mbs.toFixed(2)+" Mb/s.");


// Test decoding.
var buf = iconv_lite.encode(str, encoding);
console.log("\nDecoding "+buf.length+" bytes "+convertTimes+" times:");

var start = Date.now();
var converter = new iconv.Iconv(encoding, "utf8");
for (var i = 0; i < convertTimes; i++) {
    var s = converter.convert(buf).toString();
}
var duration = Date.now() - start;
var mbs = convertTimes*buf.length/duration/1024;

console.log("iconv: "+duration+"ms, "+mbs.toFixed(2)+" Mb/s.");

var start = Date.now();
for (var i = 0; i < convertTimes; i++) {
    var s = iconv_lite.decode(buf, encoding);
}
var duration = Date.now() - start;
var mbs = convertTimes*buf.length/duration/1024;

console.log("iconv-lite: "+duration+"ms, "+mbs.toFixed(2)+" Mb/s.");