求翻译：(2) 分析耗时组成可知，本文方法在主体计算部分用时减少到对比方法的0.62倍，说明所采用的步长控制策略是有效的；而约束校验用时减少了近8倍，从而大大提升了主体计算时间占总用时的比例，这与4.2节的耗时分析相符，说明对RPF框架在校验过程上的改进策略对速度提升效果是显著的。是什么意思？

(2) analysis of time-consuming component shows that this method is used in the main part of the calculation was reduced to 0.62 times the comparison method, the description of the step control strategy is effective; and constraint checking with a decrease of nearly 8 times when, to greatly enhanced

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(2) analysis time-consuming composition known, this article method in main calculation part unavailable reduced to comparison method of 0.62 times times, description by used of step control policy is effective of; and constraint check unavailable reduced has near 8 times times, to greatly upgrade ha

(2) analysis of time-consuming component shows that this method is used in the main part of the calculation was reduced to 0.62 times the comparison method, the description of the step control strategy is effective; and constraint checking with a decrease of nearly 8 times when, to greatly enhanced