Table 2. Memory requirement for various phases during P-RSoXS computation for Algorithm 2 and for NrComputation (Algorithm 3).

Algorithm	Variable	Data type	Size	Total size
P-RSoXS (Algorithm 2)		Complex	6(n x n y n z )	12(n x n y n z )
	p x	Complex	(n x n y n z )	2(n x n y n z )
	p y	Complex	(n x n y n z )	2(n x n y n z )
	p z	Complex	(n x n y n z )	2(n x n y n z )
	Ewald	Real	(n x n y )	(n x n y )
	EwaldAvg	Real	(n x n y )	(n x n y )
	Total	18(n x n y n z ) + 2(n x n y )
NrComputation (Algorithm 3)	M	Real	4c(n x n y n z )	4c(n x n y n z )
		Complex	6(n x n y n z )	12(n x n y n z )
	Total (non-stream)	(4c + 12)(n x n y n z )
	Total (stream)	(4 + 12)(n x n y n z )