C++ g++ versus Java GraalVM 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
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #6	3.33	5,800	1535	13.117
* C++ g++ #7	14.06	2,449	1156	14.04—14.11
C++ g++ #5	7.86	5,792	987	30.73—30.82
Java GraalVM #3	34.06	116,621	1264	34.14—34.54
C++ g++ #4	8.91	5,710	1445	34.99—35.47
C++ g++ #2	9.14	5,698	1446	35.88—36.26
Java GraalVM	9.36	117,039	1289	36.67—37.20
C++ g++ #3	37.89	2,351	600	37.90—37.99
Java GraalVM #2	38.58	114,282	520	39.41—41.11
C++ g++	10.53	5,534	1065	41.25—41.55
Java GraalVM #8	42.20	113,545	517	43.14—44.94
n-body
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #0	2.15	2,417	1933	2.155
* C++ g++ #7	4.09	5,124	1815	4.12—4.17
C++ g++ #9	5.15	2,486	1536	5.169
C++ g++ #3	5.33	2,482	1402	5.336
* C++ g++ #4	5.46	2,482	1434	5.456
* C++ g++ #2	6.02	2,490	1524	6.02—6.10
C++ g++ #5	6.33	2,478	1544	6.345
Java GraalVM #4	6.27	116,593	1495	6.399
C++ g++	6.62	2,499	1666	6.636
Java GraalVM #5	6.52	116,314	1435	6.653
C++ g++ #6	6.94	2,499	1674	6.93—6.98
Java GraalVM #3	6.94	116,380	1436	7.074
Java GraalVM #2	6.95	116,031	1430	7.10—7.14
Java GraalVM #8	7.16	115,704	1322	7.29—7.33
Java GraalVM	7.35	115,048	1437	7.49—7.53
spectral-norm
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #6	0.72	3,981	1050	2.859
* C++ g++ #5	1.33	5,820	1050	5.284
C++ g++	5.34	5,292	459	5.341
C++ g++ #7	1.53	4,071	1284	6.067
Java GraalVM #3	1.68	116,564	762	6.26—6.38
Java GraalVM #2	1.87	118,137	956	6.96—7.10
Java GraalVM #8	11.23	116,929	453	11.426
Java GraalVM	11.24	118,587	521	11.43—11.49
mandelbrot
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #4	0.89	37,941	3554	3.464
* C++ g++	0.90	37,626	1797	3.479
* C++ g++ #6	0.98	37,908	1014	3.874
C++ g++ #0	2.36	38,281	2752	9.314
* C++ g++ #7	4.87	38,048	749	13.299
C++ g++ #5	13.47	36,884	596	13.493
C++ g++ #9	3.53	37,863	732	13.587
Java GraalVM #4	4.42	165,863	667	16.09—16.16
Java GraalVM #2	4.20	155,144	802	16.47—16.74
Java GraalVM #6	4.22	150,737	808	16.48—16.66
C++ g++ #2	16.96	36,704	700	16.960
Java GraalVM	26.65	116,056	671	26.82—26.88
C++ g++ #3	27.38	5,181	421	27.381
Java GraalVM #3	7.31	151,974	910	28.82—28.93
Java GraalVM #8	30.04	116,031	441	30.33—31.87
fasta
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #9	0.78	6,214	2758	1.558
C++ g++ #2	1.85	5,108	1129	1.849
C++ g++	1.93	5,104	1064	1.930
C++ g++ #3	2.63	5,284	1311	2.632
C++ g++ #7	0.88	6,304	2711	3.060
C++ g++ #4	3.34	2,363	1291	3.335
Java GraalVM #6	1.31	121,270	2549	3.70—3.74
C++ g++ #5	1.07	7,012	2345	3.69—3.73
Java GraalVM #5	1.29	122,753	2478	3.77—3.81
C++ g++ #6	1.08	7,127	2326	3.901
Java GraalVM #4	3.58	154,337	1528	4.61—5.38
Java GraalVM #2	4.65	118,997	1259	5.25—6.21
Java GraalVM #8	9.91	217,158	894	10.48—10.56
k-nucleotide
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #2	2.02	162,349	1634	6.05—6.54
Java GraalVM	4.37	498,586	1821	12.40—23.19
C++ g++ #3	4.19	171,622	1280	13.83—14.44
C++ g++	7.04	778,510	1452	15.17—15.69
Java GraalVM #3	7.74	494,371	1642	27.48—27.81
Java GraalVM #6	7.85	492,229	1614	27.71—27.83
Java GraalVM #4	33.00	267,084	1887	33.75—34.46
Java GraalVM #5	16.79	277,905	2225	38.46—40.39
Java GraalVM #8	86.66	2,125,201	786	90.65—92.89
reverse-complement
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #2	0.76	514,101	2099	0.757
Java GraalVM #6	3.52	2,157,462	760	4.31—4.35
Java GraalVM #5	5.03	1,200,001	1115	5.389
Java GraalVM #4	5.80	2,017,374	656	6.12—6.16
C++ g++	6.55	1,006,805	599	6.55—6.68
C++ g++ #5	37.66	792,846	704	37.65—37.69
Java GraalVM #3		Bad Output
C++ g++ #6		Bad Output
Java GraalVM #7		Bad Output
C++ g++ #3		Bad Output
binary-trees
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #7	1.01	175,108	896	3.46—3.62
C++ g++ #5	1.17	208,171	891	4.12—4.17
C++ g++ #9	1.76	140,571	815	4.66—4.82
C++ g++ #6	1.93	273,973	851	4.90—5.09
C++ g++ #3	2.28	273,715	951	5.06—5.10
C++ g++ #4	2.22	273,977	826	5.20—5.33
Java GraalVM #2	5.56	1,684,255	558	7.41—7.47
Java GraalVM #4	5.96	1,735,082	846	7.76—7.85
Java GraalVM #6	6.78	1,639,674	535	8.64—8.71
Java GraalVM #7	2.82	1,834,906	841	8.83—8.96
Java GraalVM #3	6.67	1,695,027	546	9.29—9.37
C++ g++	2.69	1,896,727	760	9.43—9.52
Java GraalVM #8	8.43	1,769,333	596	10.43—10.54
C++ g++ #2	22.77	274,080	514	22.81—23.05
pidigits
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #4	0.72	6,496	521	0.717
* C++ g++ #5	0.73	6,300	804	0.730
Java GraalVM #3	0.88	111,956	770	0.970
Java GraalVM #2	1.37	120,668	944	1.551
Java GraalVM	7.11	462,918	807	8.11—8.16
regex-redux
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #6	1.14	285,639	2856	2.249
Java GraalVM	7.56	582,382	875	15.45—15.96
Java GraalVM #3	5.06	658,108	935	16.69—17.59
Java GraalVM #6	5.51	1,334,669	746	17.26—17.66
C++ g++ #3	12.37	222,614	859	18.03—18.68
C++ g++		Empty
C++ g++ #2		Empty
C++ g++ #5		Empty
C++ g++ #4		Empty
Java GraalVM #2		Bad Output
C++ g++	g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0
Java GraalVM	openjdk 23 2024-09-17 Java HotSpot(TM) 64-Bit Server VM OpenJDK GraalVM CE (build 23+37-jvmci-b01, mixed mode, sharing)