Comparing fat pointers to tagged pointers: A fat pointer is smaller than a tagged union, but it doubles the memory size compared to a 64-bit tagged pointer. This changes the memory footprint and the Garbage Collector (GC) scanning workload. Emacs was designed to keep the Lisp_Object within a single 64-bit word.
此后的三十多年，中国燃气轮机研发经历了漫长而艰难的探索期。
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