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cwrc / HuViz

LOD visualization tool for humanities datasets
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use OffscreenCanvas when available #217

Open smurp opened 6 years ago

smurp commented 6 years ago

OffscreenCanvas ought to provide better performance for HuViz. Imagine! Less jank!

Expected Behaviour

The result should be very smooth animation of the graph because it would be happening on a different thread than the rest of the user interface.

Current Behaviour

Processing incoming triples and performing the commands are operations which take a lot of processor power and are done serially. As a consequence they compete with the animation of the graph itself with the result being visible jerkiness – "jank".

Risk

It could be that the requirement of WebWorker's isolation from the rest of the compute context would mean that this is not practical without considerable reworking of HuViz internals. That would not currently be worth it... It would be relatively quick to tell whether that was blocking the effort though.

SusanBrown commented 5 years ago

Would like more info in meeting from @smurp

wolfmaul commented 5 years ago

@smurp OffscreenCanvas is currently only supported in Chrome : https://caniuse.com/#feat=offscreencanvas

This article is also quite helpful: https://newinweb.com/2018/09/10/offscreen-canvas/

wolfmaul commented 5 years ago

Another article of using offscreen items http://devbutze.blogspot.com/2014/02/html5-canvas-offscreen-rendering.html