As title, GUI rendering thread and JS engines thread mutex, but I see in the performance of chrome, GUI thread is responsible for the construction of render tree (Recalculate Style), Layout (Layout) are JS directly, it is means that JS engine threads execute to hang when it tries to half and then implement GUI thread? Figure in the frequent hang a big effect on performance?



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At the same time I also noticed that when parsing HTML back to compile implement the js, below



If the GUI thread hang when it tries to parse HTML to a half and then to perform js? During the execution of a figure in js and purple part, means and invoked the GUI thread?