Fastest way to copy file in node.js

Project that I am working at (node.js) implies a lot of operations with file system (copying/reading/writing etc). I'd like to know, what methods are the fastest, and I'd be happy for some advice.

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这是使用流在一行代码中复制文件的好方法：

var fs = require('fs');

fs.createReadStream('test.log').pipe(fs.createWriteStream('newLog.log'));

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相同的机制，但是这增加了错误处理：

function copyFile(source, target, cb) {
  var cbCalled = false;

  var rd = fs.createReadStream(source);
  rd.on("error", function(err) {
    done(err);
  });
  var wr = fs.createWriteStream(target);
  wr.on("error", function(err) {
    done(err);
  });
  wr.on("close", function(ex) {
    done();
  });
  rd.pipe(wr);

  function done(err) {
    if (!cbCalled) {
      cb(err);
      cbCalled = true;
    }
  }
}

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I was not able to get the createReadStream/createWriteStream method working for some reason, but using fs-extra npm module it worked right away. I am not sure of the performance difference though.

fs-extra

npm install --save fs-extra

var fs = require('fs-extra');

fs.copySync(path.resolve(__dirname,'./init/xxx.json'), 'xxx.json');

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