Strange behavior of polymer

[oleksii.k...@gmail.com]

I have a simple element imported to the index.html

<link rel="import" href="elements/radio.html">

it just display radio button.

then try to create dynamically XXX elements

document.addEventListener('polymer-ready', function(){

  var doc = document.createDocumentFragment(), el = null;

  for(var i =100; i-- > 0;){

     el = new RadioElement();

     doc.appendChild(el);

  }

  document.body.appendChild(doc);

});

the most time-cost line is:  doc.appendChild(el);

for 100 elements it take 30ms

for 300 - 26s

for 500 - more than 1 min.

Maybe I had made mistake somewhere. I stacked.

[Eric Bidelman]

Even under the polyfills, 500 elements takes ~200ms for me. Is this what you see?

http://jsbin.com/luyibufu/1/edit 

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[Oleksii Khliupin]

yes. the same... that's why i told that is very strange behavior. I'd try to debug deeply tomorrow. maybe i'll understand where the problem is.

thank you.

понедельник, 3 марта 2014 г., 18:07:47 UTC-5 пользователь Eric Bidelman написал:

[Oleksii Khliupin]

I had update a little bit your code: just add import styles inside template.

http://jsbin.com/luyibufu/3/edit

For the Firefox - it's working very fast, like without import styles tag.

For the Chrome - you can see browser slowdown.

already submitted issue to the chromium. we will see.

понедельник, 3 марта 2014 г., 18:07:47 UTC-5 пользователь Eric Bidelman написал:

Even under the polyfills, 500 elements takes ~200ms for me. Is this what you see?

http://jsbin.com/luyibufu/1/edit