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If you’re wanting long, highly detailed, in-depth explanations then this isn’t what this site is really for
Since react is going to redesign their entire internal structure of updating react components inside the dom. They’ve uploaded a video regarding the changes with a deep explanation of what is going on. I highly recommend to watch this video to get an overall view on this algorithm.
(React Fiber announcement – React Conference 2017)
Source:stackexchange.com