C++ g++ versus Java naot

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

If the fastest programs are flagged * possible hand-written vector instructions or "unsafe" or naked ffi, does the host language matter? You might be more interested in the less optimised programs — more seconds, less gz source code.

fannkuch-redux
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #6	3.33	13.12	5,800	1535	4.64
* C++ g++ #7	14.06	14.04—14.11	2,449	1156	2.95
C++ g++ #5	7.86	30.73—30.82	5,792	987	3.67
Java naot #3	34.41	34.41	17,514	1264	98.17
C++ g++ #4	8.91	34.99—35.47	5,710	1445	12.14
C++ g++ #2	9.14	35.88—36.26	5,698	1446	11.86
Java naot	9.26	36.60	18,522	1289	96.54
C++ g++ #3	37.89	37.90—37.99	2,351	600	2.70
C++ g++	10.53	41.25—41.55	5,534	1065	3.88
Java naot #2	46.96	46.96	16,175	520	95.31
Java naot #8	51.93	51.94—51.98	16,269	517	93.86
n-body
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #0	2.15	2.16	2,417	1933	3.66
* C++ g++ #7	4.09	4.12—4.17	5,124	1815	4.18
C++ g++ #9	5.15	5.17	2,486	1536	3.03
C++ g++ #3	5.33	5.34	2,482	1402	2.85
* C++ g++ #4	5.46	5.46	2,482	1434	2.83
C++ g++ #2	6.02	6.02—6.10	2,490	1524	3.04
Java naot #4	6.02	6.01—6.09	20,296	1495	145.73
C++ g++ #5	6.33	6.35	2,478	1544	2.92
C++ g++	6.62	6.64	2,499	1666	3.15
Java naot #2	6.77	6.77	19,952	1430	144.22
Java naot #3	6.77	6.75—6.83	19,923	1436	143.42
C++ g++ #6	6.94	6.93—6.98	2,499	1674	2.98
Java naot #5	7.23	7.21—7.27	19,972	1435	146.75
Java naot	7.26	7.25—7.29	24,383	1437	148.73
Java naot #8	7.30	7.29—7.33	19,862	1322	145.10
spectral-norm
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #6	0.72	2.86	3,981	1050	3.08
* C++ g++ #5	1.33	5.28	5,820	1050	2.86
C++ g++	5.34	5.34	5,292	459	3.75
Java naot #8	5.35	5.35	20,886	453	146.59
Java naot	5.36	5.35	25,215	521	146.57
Java naot #2	1.47	5.71	26,616	956	142.41
Java naot #3	1.47	5.72	29,483	762	144.71
C++ g++ #7	1.53	6.07	4,071	1284	2.71
mandelbrot
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #4	0.89	3.46	37,941	3554	5.04
* C++ g++	0.90	3.48	37,626	1797	3.59
* C++ g++ #6	0.98	3.87	37,908	1014	4.36
C++ g++ #0	2.36	9.31	38,281	2752	4.60
C++ g++ #7	4.87	13.30	38,048	749	3.03
C++ g++ #5	13.47	13.49	36,884	596	2.76
C++ g++ #9	3.53	13.59	37,863	732	3.03
Java naot #6	3.96	15.67	58,348	808	97.90
Java naot #4	4.27	15.76	82,633	667	96.47
Java naot #2	4.01	15.87	58,278	802	96.26
C++ g++ #2	16.96	16.96	36,704	700	3.28
C++ g++ #3	27.38	27.38	5,181	421	3.69
Java naot #8	28.57	28.53—28.69	16,392	441	95.54
Java naot	30.59	30.44—30.97	19,927	671	146.91
Java naot #3	7.80	31.00	63,054	910	145.66
fasta
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #9	0.78	1.56	6,214	2758	6.43
C++ g++ #2	1.85	1.85	5,108	1129	2.89
C++ g++	1.93	1.93	5,104	1064	2.98
C++ g++ #3	2.63	2.63	5,284	1311	3.33
C++ g++ #7	0.88	3.06	6,304	2711	4.58
Java naot #6	1.11	3.19	23,798	2549	95.92
Java naot #4	3.26	3.26	16,400	1528	95.52
C++ g++ #4	3.34	3.34	2,363	1291	3.03
C++ g++ #5	1.07	3.69—3.73	7,012	2345	3.90
Java naot #5	1.13	3.80	24,113	2478	95.50
C++ g++ #6	1.08	3.90	7,127	2326	3.72
Java naot #2	5.69	5.70	16,146	1259	97.56
Java naot #8	10.45	10.48—10.54	103,199	894	93.89
k-nucleotide
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #2	2.02	6.05—6.54	162,349	1634	7.41
C++ g++ #3	4.19	13.83—14.44	171,622	1280	5.17
C++ g++	7.04	15.17—15.69	778,510	1452	6.55
Java naot	6.25	20.46—20.50	366,531	1821	150.33
Java naot #3	8.31	28.22—28.29	363,635	1642	150.99
Java naot #6	8.35	28.25—28.30	397,414	1614	150.20
Java naot #4	36.76	36.75—38.47	183,878	1887	150.92
Java naot #5	22.53	51.46—52.54	203,649	2225	152.81
Java naot #8	85.57	87.80—89.42	1,782,706	786	149.27
reverse-complement
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* C++ g++ #2	0.76	0.76	514,101	2099	4.30
Java naot #6	4.05	4.72—4.77	2,063,376	760	94.05
Java naot #5	6.03	6.05	1,100,202	1115	95.80
C++ g++	6.55	6.55—6.68	1,006,805	599	3.43
Java naot #4	6.75	6.76	1,914,102	656	95.45
C++ g++ #5	37.66	37.65—37.69	792,846	704	3.40
Java naot #3		Bad Output
Java naot #7		Bad Output
C++ g++ #6		Bad Output
C++ g++ #3		Bad Output
binary-trees [ Contentious. Different approaches. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #7	1.01	3.46—3.62	175,108	896	7.50
C++ g++ #5	1.17	4.12—4.17	208,171	891	3.87
C++ g++ #9	1.76	4.66—4.82	140,571	815	4.05
C++ g++ #6	1.93	4.90—5.09	273,973	851	4.98
Java naot #3	4.85	4.85—4.91	290,574	546	96.06
C++ g++ #3	2.28	5.06—5.10	273,715	951	4.79
Java naot #6	5.12	5.13—5.17	299,389	535	97.18
Java naot #2	5.15	5.17—5.27	299,610	558	96.54
C++ g++ #4	2.22	5.20—5.33	273,977	826	5.16
Java naot #4	5.54	5.54—5.76	305,373	846	95.54
Java naot #7	3.90	7.33—7.53	338,911	841	95.08
C++ g++	2.69	9.43—9.52	1,896,727	760	5.34
C++ g++ #2	22.77	22.81—23.05	274,080	514	3.52
pidigits [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #4	0.72	0.72	6,496	521	3.45
* C++ g++ #5	0.73	0.73	6,300	804	3.34
* Java naot #5	8.09	8.12—8.18	230,797	925	167.91
Java naot	8.86	8.91	304,071	807	100.74
* Java naot #2		Empty
* Java naot #4		Empty
* Java naot #3		Empty
regex-redux [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
C++ g++ #6	1.14	2.25	285,639	2856	5.06
* Java naot #4	1.38	3.98	554,586	2441	167.77
C++ g++ #3	12.37	18.03—18.68	222,614	859	12.29
Java naot	11.36	20.96—21.08	280,367	875	101.78
Java naot #6	7.66	21.95—21.99	392,942	746	101.47
Java naot #3	7.63	22.03—22.08	383,447	935	102.19
C++ g++		Empty
* Java naot #2		Empty
C++ g++ #2		Empty
C++ g++ #5		Empty
C++ g++ #4		Empty
C++ g++	g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0
Java naot	native-image 23.0.2 2025-01-21 GraalVM Runtime Environment Oracle GraalVM 23.0.2+7.1