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 #3	39.96	44,308	1264	40.06
Java	10.85	44,612	1289	42.80
Java OpenJ9 #3	42.96	66,212	1264	43.25
Java #2	45.77	42,552	520	45.83
Java #8	45.90	42,568	517	45.97
Java OpenJ9	11.92	66,544	1289	46.80
Java OpenJ9 #8	54.90	76,632	517	55.21
Java OpenJ9 #2	54.98	68,256	520	55.27
n-body
source	secs	mem	gz	cpu secs
Java #4	6.88	42,028	1495	6.91
Java #5	7.30	43,424	1435	7.36
Java #2	7.48	42,260	1430	7.52
Java #3	7.49	42,292	1436	7.52
Java #8	7.59	42,924	1322	7.64
Java	7.84	42,652	1437	7.88
Java OpenJ9 #4	10.67	78,524	1495	10.83
Java OpenJ9 #3	11.25	78,816	1436	11.43
Java OpenJ9 #2	11.26	78,656	1430	11.44
Java OpenJ9 #8	11.55	77,432	1322	11.73
Java OpenJ9	11.83	78,996	1437	12.06
Java OpenJ9 #5	12.02	77,184	1435	12.21
spectral-norm
source	secs	mem	gz	cpu secs
Java #8	5.43	43,368	453	5.49
Java #3	1.57	44,160	762	5.93
Java #2	1.61	43,028	956	6.08
Java OpenJ9 #2	1.75	69,652	956	6.52
Java OpenJ9 #3	2.21	73,692	762	8.33
Java OpenJ9 #8	10.37	71,572	453	10.60
mandelbrot
source	secs	mem	gz	cpu secs
Java #2	4.08	82,216	802	16.06
Java #4	4.41	105,000	667	16.14
Java #6	4.19	82,232	808	16.42
Java OpenJ9 #6	5.17	132,880	808	20.24
Java OpenJ9 #4	6.31	133,440	667	23.20
Java OpenJ9 #2	5.92	132,360	802	23.21
Java	24.50	42,272	671	24.57
Java OpenJ9	26.81	76,808	671	27.07
Java #3	6.96	82,972	910	27.54
Java #8	27.67	45,844	441	27.79
Java OpenJ9 #3	7.71	129,500	910	30.32
Java OpenJ9 #8	30.60	110,372	441	31.46
fasta
source	secs	mem	gz	cpu secs
Java #4	3.28	44,352	1528	3.40
Java OpenJ9 #4	3.45	67,284	1528	3.66
Java #6	1.16	49,848	2549	3.71
Java #5	1.24	49,640	2478	4.13
Java OpenJ9 #6	1.44	71,496	2549	4.46
Java OpenJ9 #5	1.44	75,764	2478	4.50
Java #2	4.45	48,896	1259	4.60
Java OpenJ9 #2	5.18	65,184	1259	5.37
Java #8	10.12	182,140	894	10.66
Java OpenJ9 #8	12.18	94,144	894	12.92
k-nucleotide
source	secs	mem	gz	cpu secs
Java	4.92	427,448	1821	15.77
Java #6	7.27	426,032	1614	25.17
Java #3	7.34	426,540	1642	25.47
Java #4	34.33	197,748	1887	34.67
Java OpenJ9	25.93	353,340	1821	37.25
Java OpenJ9 #4	47.00	230,268	1887	47.60
Java #5	22.10	222,396	2225	48.14
Java OpenJ9 #5	22.30	230,684	2225	55.47
Java OpenJ9 #6	32.20	410,000	1614	61.17
Java OpenJ9 #3	33.04	406,700	1642	63.16
Java #8	81.36	1,559,968	786	83.57
Java OpenJ9 #8	90.82	1,352,468	786	96.56
reverse-complement
source	secs	mem	gz	cpu secs
Java #6	3.15	2,032,996	760	3.79
Java #5	4.72	1,097,732	1115	4.84
Java #4	5.65	1,891,656	656	5.77
Java #7	23.98	1,037,708	1654	6.26
Java OpenJ9 #6	5.85	2,066,988	760	6.94
Java OpenJ9 #4	6.89	1,934,944	656	7.42
Java OpenJ9 #5	8.06	1,141,716	1115	8.64
Java OpenJ9 #7	178.22	1,088,132	1654	322.65
Java OpenJ9 #3		Bad Output
Java #3		Bad Output
binary-trees
source	secs	mem	gz	cpu secs
Java #4	4.41	1,821,244	846	5.14
Java #6	4.87	1,782,568	535	5.63
Java #3	4.85	1,769,500	546	5.65
Java #2	5.09	1,820,068	558	5.83
Java OpenJ9 #2	4.50	589,508	558	7.12
Java #8	6.57	1,767,108	596	7.29
Java #7	2.62	1,803,192	841	8.14
Java OpenJ9 #7	2.43	1,163,020	841	8.17
Java OpenJ9 #4	5.58	643,232	846	8.52
Java OpenJ9 #3	5.77	927,036	546	8.80
Java OpenJ9 #6	5.94	692,352	535	9.08
Java OpenJ9 #8	6.32	603,660	596	9.08
pidigits
source	secs	mem	gz	cpu secs
* Java #3	0.80	41,900	770	0.83
Java OpenJ9 #3	0.88	74,760	770	0.95
* Java #2	1.29	45,768	944	1.37
Java OpenJ9 #2	1.36	78,192	944	1.49
Java	7.68	482,056	807	8.75
Java OpenJ9	11.48	91,116	807	12.60
regex-redux
source	secs	mem	gz	cpu secs
Java #2	1.55	372,764	2201	3.16
Java OpenJ9 #2	1.78	454,024	2201	4.87
Java	8.47	575,552	875	16.69
Java #6	5.60	1,237,440	746	17.12
Java #3	5.25	611,476	935	17.25
Java OpenJ9 #6	9.34	521,136	746	26.31
Java OpenJ9 #3	9.44	500,788	935	26.80
Java OpenJ9	14.74	424,988	875	26.86
Java	java 23 2024-09-17 Java HotSpot(TM) 64-Bit Server VM (build 23+37-2369, mixed mode, sharing)
Java OpenJ9	openjdk 23 2024-09-17 IBM Semeru Runtimebr> Eclipse OpenJ9 (build openj9-0.47.0) (JIT enabled, AOT enabled)