Authenticated-Encryption Software Performance:
Comparison of OCB1, OCB2, and OCB3

Environment	Time (cpb vs. bytes)	Overhead (subtract time for CTR)	Mode  (clickable)	Over 4096	Time 4096	IPI (cpb)	Size (bytes)	Init (cycles)
Intel x86 i5-650 “Clarkdale” 64-bit NI			OCB1  OCB2  OCB3  CTR	0.21   0.53   0.21	1.48   1.80   1.48   1.27	2.08   2.41   1.87   1.37	672   448   624   244	296   185   295   115
Intel x86 i5-650 “Clarkdale” 32-bit NI			OCB1  OCB2  OCB3  CTR	0.21   0.40   0.20	1.60   1.79   1.59   1.39	2.22   2.42   2.04   1.52	672   448   624   244	327   197   318   130
Intel x86 i5-650 “Clarkdale” 64-bit Käsper-Schwabe			OCB1  OCB2  OCB3  CTR	0.54   0.81   0.31	8.28   8.55   8.05   7.74	13.4   13.6   9.24   8.98	3136   2912   3216   1424	3440   3350   3430   1180
ARM Cortex-A8 32-bit OpenSSL			OCB1  OCB2  OCB3  CTR	3.90   4.02   3.49	29.3   29.5   28.9   25.4	31.5   31.8   30.9   25.9	800   576   784   244	2070   1810   2060   236
PowerPC 970 64-bit OpenSSL			OCB1  OCB2  OCB3  CTR	0.39   0.31   -0.02	38.2   38.1   37.5   37.5	41.0   41.1   39.6   37.8	800   576   784   244	2290   2110   2300   309
UltraSPARC III 64-bit OpenSSL			OCB1  OCB2  OCB3  CTR	1.14   0.39   0.64	25.5   24.8   25.0   24.1	27.7   27.0   26.5   24.4	800   576   784   244	1760   1700   1770   213

Last updated: 2010.11.05