Table 2.

Execution time (in seconds) to detect chromosomal abnormalities using different methods.

	12 M reads	20 M reads	40 M reads
Standard Z-score (STDZ) method	1	1	2
GC Correction Z-score (GCCZ) method	312	629	1,156
Internal reference Z-score (IRZ) method	1	1	1
Subchromosome abnormality Z-score (SCAZ) method	2,074	2,105	2,278

The computing platform is a Linux system with 16 threads (0.8 GHZ for each) and RAM of 64 GB. Execution time was averaged over five repetitive runs.