How React Works · Part 058 min read
Reconciliation - Finding What Changed
How React compares the new element tree with the old one in roughly linear time, why type and key decide whether state survives, and what the comparison hands to the commit.
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- React Internals · Part 1510 min read
Rendering With vs Without the Compiler
The reconciler has always had a cheap bailout: if a fiber's props object is the same reference as last time and it has no pending work, beginWork skips it and possibly its whole…
- React Internals · Part 0712 min read
beginWork and Reconciliation
beginWork(current, wip, renderLanes) does one of two things for each fiber. Either it bails out (props object identical, no scheduled update or context change, so it reuses…