I realize you mentioned hooks not react in general, that code is here: https://github.com/facebook/react/blob/657698e48d5b093b4ea5a7684e26d3fdd16695f2/packages/

I realize you mentioned hooks not react in general, that code is here: https://github.com/facebook/react/blob/657698e48d5b093b4ea5a7684e26d3fdd16695f2/packages/react-reconciler/src/ReactFiberHooks.js#L846 https://github.com/facebook/react/blob/657698e48d5b093b4ea5a... You can see the linked list insertion right below that too.