JavaScript Ractive computed template functions leaking?

Before i go on i should say that i'm not very comfortable with the chrome debugger, but i've hit a performance problem and chrome seems to mirror it in it's timeline.

I've got two components. One Parent and one Child. Parents template loops over an array of variables called events and passes event={{.}} to a Child. For each Child created the child executes {{moment().format("HH:mm:ss")}}. Parent then replaces the entire events array with a new array, and {{moment().format("HH:mm:ss")}} gets executed X times again.

If you start chrome and use the developer tools Timeline function you can press the small Record button and then spam the Next page button for a while(I did it until ~15% of the buffer was filled) then after ~15% of data you can press the garbage button(GC), wait a few seconds and stop recording.

Now on the result you'll see where you ran the GC by looking at where the Listeners is going straight down. However the nodes and memory allocation are still high.

In my real application the computations are more and heavier and the memory gets filled real quick which makes the page slow and sluggish.

Here's the fiddle so you can try it:

http://jsfiddle.net/PCcqJ/104/

EDIT:

After some more debugging i found out that if i removed event={{.}} from the Item there was no longer an infinite amount of nodes being created. I have a list which shows 7 items per page. Then when i press "Next Page" 7(always 7) new items are displayed. See the code:

{{#each dates}}
  {{#each itemsForDate(.)}}
    <div class="item">
      <Item data={{.}} />
    </div>
  {{/each}}
{{/each}}

It seems like what i pass to the Item as data isn't garbage collected on teardown for some reason, even though i've removed my own references to the data.

Answer:1

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