Hello, I'm using the performance tool in Chrome devtools to test my page. I am confused that I get different results in FPS when toggling the "Disable JavaScript samples" checkbox. Here are two examples:
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As you can see in the pictures, the detailed version which show the stack has lower FPS during the several timers for there are always forced reflow found in the stack. However when I uncheck the "Disable JavaScript samples", there aren't any forced reflow shown at all so that the FPS is higher. The results are always the same so that this is not an accidental one.

I am curious that "Disable JavaScript samples" affects the page rendering or any other reasons? Thank you for your help!