Java versus Java OpenJ9 fastest performance

How the programs are written matters! Always look at the source code.

If the fastest programs are hand-written vector instructions, does the host language matter? You might be more interested in the less optimised programs — more seconds, less gz source code.

fannkuch-redux
source	secs	mem	gz	cpu secs
Java	10.04	42,708	1289	39.47
Java #3	40.81	42,920	1264	40.91
Java OpenJ9 #3	43.48	60,828	1264	43.81
Java #2	44.33	41,012	520	44.38
Java OpenJ9	12.08	61,032	1289	47.09
Java OpenJ9 #2	52.36	62,740	520	52.54
n-body
source	secs	mem	gz	cpu secs
Java #5	6.79	41,476	1435	6.83
Java #4	6.91	41,364	1495	6.95
Java #2	7.58	41,440	1430	7.62
Java #3	7.63	41,352	1436	7.67
Java	7.89	41,616	1437	7.93
Java OpenJ9 #4	10.49	70,480	1495	10.66
Java OpenJ9 #2	10.98	70,236	1430	11.17
Java OpenJ9 #3	11.01	69,788	1436	11.20
Java OpenJ9	11.52	70,428	1437	11.72
Java OpenJ9 #5	11.89	70,304	1435	12.09
spectral-norm
source	secs	mem	gz	cpu secs
Java #3	1.69	43,028	762	6.41
Java OpenJ9 #2	1.85	58,096	956	6.65
Java	7.08	42,384	521	7.14
Java OpenJ9 #3	2.31	64,256	762	8.43
Java #2	2.44	42,180	956	9.47
Java OpenJ9	10.44	57,676	521	10.67
mandelbrot
source	secs	mem	gz	cpu secs
Java #2	4.14	81,668	802	16.25
Java #4	4.44	104,696	667	16.25
Java #6	4.31	81,888	808	16.97
Java OpenJ9 #6	5.28	121,716	808	20.42
Java OpenJ9 #4	6.37	133,496	667	23.21
Java OpenJ9 #2	6.00	123,668	802	23.28
Java	25.75	41,428	671	25.81
Java OpenJ9	26.79	73,420	671	26.97
Java OpenJ9 #3	7.10	122,916	910	27.59
Java #3	7.42	81,216	910	29.33
pidigits
source	secs	mem	gz	cpu secs
Java #3	0.94	40,944	770	0.96
Java OpenJ9 #3	1.08	58,244	770	1.15
Java #2	1.35	44,528	944	1.42
Java OpenJ9 #2	1.51	73,768	944	1.58
Java	7.63	491,600	807	8.66
Java OpenJ9	11.26	93,288	807	12.24
regex-redux
source	secs	mem	gz	cpu secs
Java #8	1.62	372,312	2201	3.20
Java	8.58	586,528	875	16.95
Java #6	5.59	1,235,356	746	17.14
Java #3	5.25	629,428	935	17.37
Java OpenJ9 #6	8.90	483,136	746	25.61
Java OpenJ9 #3	8.97	484,568	935	25.70
Java OpenJ9	14.14	421,008	875	25.94
Java OpenJ9 #8		Failed
fasta
source	secs	mem	gz	cpu secs
Java #4	3.16	42,812	1528	3.27
Java OpenJ9 #4	3.48	61,272	1528	3.61
Java #6	1.18	48,364	2549	3.74
Java #5	1.26	48,824	2478	4.17
Java #2	4.39	47,624	1259	4.56
Java OpenJ9 #5	1.51	63,764	2478	4.57
Java OpenJ9 #6	1.54	68,428	2549	4.74
Java OpenJ9 #2	5.26	63,484	1259	5.48
k-nucleotide
source	secs	mem	gz	cpu secs
Java	5.02	369,032	1821	16.31
Java #3	7.26	365,384	1642	25.09
Java #6	7.26	365,680	1614	25.28
Java #4	34.70	195,564	1887	35.08
Java OpenJ9	24.05	397,412	1821	35.09
Java OpenJ9 #3	11.33	356,560	1642	37.30
Java #5	20.44	218,932	2225	44.56
Java OpenJ9 #4	45.35	225,528	1887	46.17
Java OpenJ9 #5	22.22	223,540	2225	55.23
Java OpenJ9 #6	29.83	410,424	1614	55.53
reverse-complement
source	secs	mem	gz	cpu secs
Java #6	3.40	2,031,576	760	4.06
Java #5	4.78	1,096,264	1115	4.92
Java #4	5.59	1,890,020	656	5.71
Java #7	23.61	1,036,152	1654	6.24
Java OpenJ9 #6	6.18	2,055,184	760	7.36
Java OpenJ9 #5	7.84	1,148,652	1115	8.39
Java OpenJ9 #4	37.16	1,916,220	656	37.74
Java OpenJ9 #7	158.33	1,076,516	1654	281.96
Java OpenJ9 #8		Bad Output
Java OpenJ9 #3		Bad Output
Java #3		Bad Output
Java #8		Bad Output
binary-trees
source	secs	mem	gz	cpu secs
Java #4	4.46	1,957,564	846	5.19
Java #3	4.90	2,032,184	546	5.67
Java #6	5.02	2,065,280	535	5.79
Java #2	5.11	2,064,188	558	5.83
Java OpenJ9 #7	2.22	1,160,464	841	7.03
Java OpenJ9 #4	5.40	716,792	846	7.91
Java #7	2.59	1,718,620	841	8.08
Java OpenJ9 #6	5.66	623,232	535	8.58
Java OpenJ9 #3	5.77	930,108	546	8.67
Java OpenJ9 #2	5.75	601,712	558	8.70
Java	java 22 2024-03-19 Java HotSpot(TM) 64-Bit Server VM (build 22+36-2370, mixed mode, sharing)
Java OpenJ9	javac 21.0.2