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https://issues.apache.org/jira/browse/GUACAMOLE-884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Jumper reassigned GUACAMOLE-884:
-------------------------------------
Assignee: Mike Jumper
> Avoid Image where possible without performance penalty
> ------------------------------------------------------
>
> Key: GUACAMOLE-884
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-884
> Project: Guacamole
> Issue Type: Improvement
> Components: guacamole-common-js
> Reporter: jianfeng chen
> Assignee: Mike Jumper
> Priority: Minor
> Attachments: 001.png, CorrectCode.png, firefox.png, guac-js-heap.png,
> pysh.py
>
>
> In some browsers, using the {{Image}} object to read images from data URIs
> results in a memory leak outside of the JavaScript heap. This behavior has
> been observed in at least Chrome and some versions of Firefox, perhaps also
> Safari and IE. The main symptoms of the issue are:
> * Memory consumption of the browser/tab process increases relatively
> consistently.
> * JavaScript heap consumption does not increase, instead following the
> expected GC sawtooth pattern with an overall upper bound.
> From the original description of this JIRA issue:
> {quote}
> In SSH protocol, executing Python scripts will constantly render and refresh
> the interface, resulting in a gradual increase in browser memory, and finally
> browser crash.
> The script content is in the attachment.
> Execute script instructions：python pysh.py 1024 1
> {quote}
> It is possible to avoid using {{Image}} on platforms which support
> {{createImageBitmap()}}. While prior tests leveraging {{Blob}} showed
> significant reductions in performance, those tests used {{createObjectURL()}}
> to load the image from the {{Blob}}. The decrease in performance doesn't
> appear to occur for {{createImageBitmap()}}.
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