number crunching

noun
🔊/ˈnʌmbə krʌntʃɪŋ/
🔊/ˈnʌmbər krʌntʃɪŋ/
[uncountable] (informal)
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  1. the process of calculating numbers, especially when a large amount of data is involved and the data is processed in a short space of time数字密集运算