This fragmentation hurts portability. Code that performs well on one runtime may behave differently (or poorly) on another, even though it's using "standard" APIs. The complexity burden on runtime implementers is substantial, and the subtle behavioral differences create friction for developers trying to write cross-runtime code, particularly those maintaining frameworks that must be able to run efficiently across many runtime environments.
the end of each business day, all of these slips (which basically constitute
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Staggered vs columnar
春节返乡，我在家门口看见了一家有些“不像这里”的店。