The best way to find out is probably to try both options and use the profiler in your browser’s dev tools to analyse the performance. If you have never used the dev tools, there is a bit of a learning curve but it’s worth it! 
I would also recommend testing across different browsers (Chrome, Safari, Firefox) because performance can vary wildly based on which Javascript engine is running your code. Testing on mobile is also a good idea if you expect people to check out your sketch on phones or tablets.
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