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Canvas resources

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My script has one rendering canvas, but also a few more or less static information canvases. Editing, settings, instruments etc. These static cavases are "hidden?" in button contexts, and only shown when repective button pressed.

Now i wonder a bit about canvases, does all the canvases i created take up memory weither visible or not on screen? 

And does a static canvas also use any of the cpu? Can one, and should i, create and remove/revoke and reload the static canvases every time button the button for it pressed or is it just unnecessary work? 

If so how do one revoke "garbage collect?" a created canvas each time button closed?

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Canvas resources Jonas Thörnvall <jonas.thornvall@gmail.com> - 2018-11-19 15:37 -0800
  Re: Canvas resources JJ <jj4public@vfemail.net> - 2018-11-20 10:39 +0700

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