RAID-0 vs RAID-4 or RAID-5: Does the CPU Usage Matter?
One reader expressed concern that the CPU usage required for parity calculations during writes would chew up too much CPU power. This concern is put to rest in this analysis:
CPU Usage for RAID-0 vs RAID-4 or RAID -5

Throughput of hashing speed with IntegrityChecker, RAID-0 vs RAID-4 SSDs

~130% CPU Usage for RAID-4 or RAID-5 during intensive write
(during disktester fill-volume test)
(during disktester fill-volume test)