I am trying to develop an extension which uses HTML5 canvas for resizing images. When I try to put an image data URL to it and ask it to return another data URL after resizing, it may increase the memory usage a lot (depending on the image). When I try to remove the element by canvas = null, the usage does not decrease.
I have several questions to ask: 1. is the cost of using canvas to resize image very large? 2. is there any other way to resize image and return new data url other than using canvas? 3. when i use canvas=null, does it mean that the javascript engine will clean it? (i cannot see any GC related to that) 4. is there any way to force the chrome js engine to do Garbage Collection? 5. in task manger of chrome. is the memory usage shown only caused by the extension alone, not sharing the memory with the pages/chrome?
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