Rust versus C++ g++ 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
C++ g++ #6	3.26	19,712	1535	12.91
C++ g++ #7	13.96	19,712	1156	13.96
Rust #6	3.88	19,804	1260	15.27
Rust #4	6.93	19,804	1026	27.20
Rust #5	7.66	19,804	1023	29.90
C++ g++ #5	8.00	19,712	987	31.23
Rust #2	9.15	19,804	1198	35.90
C++ g++ #4	9.26	19,688	1445	36.31
C++ g++ #3	36.90	19,688	600	36.90
C++ g++ #2	9.55	19,712	1446	37.53
C++ g++	10.87	19,712	1065	42.73
n-body
source	secs	mem	gz	cpu secs
C++ g++ #0	2.15	19,736	1933	2.15
Rust #9	2.19	19,804	1881	2.19
Rust #7	3.25	19,804	1759	3.24
Rust #2	3.94	19,804	1809	3.94
C++ g++ #7	3.96	19,736	1815	3.96
C++ g++ #2	4.20	19,736	1884	4.20
Rust #6	4.30	19,804	1796	4.30
Rust #8	4.49	19,804	1774	4.49
Rust #5	5.01	19,804	2224	5.01
Rust #4	5.10	19,804	1810	5.10
C++ g++ #3	5.31	19,736	1402	5.31
C++ g++ #9	5.44	19,736	1536	5.44
C++ g++ #4	5.45	19,736	1434	5.45
Rust	5.51	19,804	1483	5.51
Rust #3	5.57	19,804	1546	5.57
C++ g++ #5	6.02	19,736	1544	6.01
C++ g++	6.50	19,736	1666	6.50
C++ g++ #8	6.54	19,736	1524	6.54
C++ g++ #6	6.91	19,736	1674	6.91
spectral-norm
source	secs	mem	gz	cpu secs
C++ g++ #6	0.72	19,884	1050	2.85
Rust #6	0.72	19,804	1132	2.85
Rust #4	0.72	19,804	823	2.85
Rust #5	0.72	19,804	1062	2.85
Rust #2	0.78	19,804	1117	2.98
Rust	0.77	19,804	1262	2.99
Rust #3	0.78	19,804	1060	3.00
C++ g++ #5	1.33	19,788	1050	5.27
C++ g++	5.37	19,852	459	5.37
C++ g++ #8	1.52	19,820	1284	6.06
Rust #7		Make Error
mandelbrot
source	secs	mem	gz	cpu secs
C++ g++	0.89	34,944	1797	3.47
C++ g++ #4	0.89	35,328	3554	3.47
Rust #4	0.94	33,408	1301	3.73
C++ g++ #6	0.98	35,072	1014	3.90
Rust #8	1.06	33,408	770	4.22
Rust #6	1.08	34,048	1338	4.23
Rust #7	1.06	33,408	763	4.23
Rust #5	1.13	34,048	725	4.43
Rust #3	1.14	19,860	1013	4.54
Rust	2.00	39,296	874	7.84
C++ g++ #0	2.36	35,456	2752	9.30
C++ g++ #8	4.84	34,944	749	13.21
C++ g++ #5	13.35	34,560	596	13.35
C++ g++ #9	3.50	35,072	732	13.49
C++ g++ #7	3.51	35,072	1023	13.94
C++ g++ #2	16.94	34,560	700	16.94
C++ g++ #3	27.27	19,736	421	27.27
pidigits
source	secs	mem	gz	cpu secs
Rust #4	0.71	19,804	804	0.71
Rust #3	0.74	19,804	1373	0.74
Rust	0.74	19,804	1426	0.74
Rust #2	0.74	19,804	1312	0.74
C++ g++ #5	0.87	19,736	804	0.87
C++ g++ #4	0.89	19,736	521	0.88
regex-redux
source	secs	mem	gz	cpu secs
Rust #6	1.18	154,096	994	1.44
Rust	1.33	153,792	811	1.58
Rust #5	1.34	203,224	777	1.58
Rust #2	1.34	153,776	707	1.60
Rust #4	1.35	199,548	771	1.61
Rust #3	1.36	202,908	726	1.61
Rust #7	0.78	149,888	2464	1.99
C++ g++ #6	1.18	276,148	2856	2.23
C++ g++	3.56	212,180	662	3.56
C++ g++ #2	2.86	212,648	706	3.62
C++ g++ #5	3.81	215,648	859	4.53
C++ g++ #3	12.46	215,472	859	18.08
C++ g++ #4		Make Error
fasta
source	secs	mem	gz	cpu secs
Rust #7	0.77	19,804	2533	1.54
C++ g++ #8	0.78	19,712	2758	1.54
C++ g++ #2	1.80	19,712	1129	1.80
C++ g++	1.90	19,712	1064	1.90
Rust #3	1.98	19,804	1235	1.97
C++ g++ #3	2.62	19,712	1311	2.62
Rust #2	0.92	19,932	1910	3.09
Rust #8	0.93	19,804	1952	3.14
Rust #5	0.94	19,932	1963	3.14
C++ g++ #4	3.34	19,712	1291	3.34
Rust #6	3.46	123,652	959	3.45
Rust #4	3.57	123,652	944	3.57
C++ g++ #5	1.07	19,712	2345	3.67
C++ g++ #6	1.07	19,712	2326	3.85
Rust	4.24	19,804	1240	4.24
C++ g++ #7		Make Error
k-nucleotide
source	secs	mem	gz	cpu secs
C++ g++ #2	2.02	156,512	1634	6.09
Rust #7	2.84	133,840	1585	8.91
Rust #8	3.53	137,372	1549	10.47
Rust #6	2.96	159,600	1697	10.67
Rust #5	3.96	137,844	1745	11.95
C++ g++ #3	4.18	165,384	1280	13.93
C++ g++	7.10	757,084	1452	14.78
Rust #2	6.28	138,736	1350	16.39
Rust #9	6.44	135,800	1850	17.00
Rust #4	6.74	137,440	1755	18.30
Rust	22.54	157,124	1086	67.38
reverse-complement
source	secs	mem	gz	cpu secs
C++ g++ #2	0.71	499,712	2099	0.71
Rust	0.53	498,816	2762	0.83
Rust #2	0.98	995,200	1332	1.62
Rust #3	0.98	995,200	1105	1.68
C++ g++ #6	3.26	1,517,580	1827	4.32
C++ g++	6.50	979,912	599	6.50
C++ g++ #5	36.24	771,432	704	36.24
C++ g++ #3		Bad Output
binary-trees
source	secs	mem	gz	cpu secs
C++ g++ #7	0.96	201,536	896	3.35
Rust #5	1.08	198,656	771	3.77
C++ g++ #5	1.15	200,660	891	4.08
Rust #2	1.22	199,684	729	4.29
C++ g++ #9	1.65	136,064	815	4.55
C++ g++ #6	1.92	266,112	851	4.74
Rust #4	1.33	187,948	765	4.80
Rust #3	1.40	188,740	762	5.06
C++ g++ #3	2.25	265,600	951	5.11
C++ g++ #8	2.22	266,112	826	5.26
Rust	2.05	132,992	760	7.21
C++ g++	2.68	2,068,612	760	9.34
C++ g++ #2	21.96	265,856	514	21.96
C++ g++ #4		Make Error
Rust	1.80.1 (3f5fd8dd4 2024-08-06) LLVM version: 18.1.7
C++ g++	Ubuntu 13.2.0-23ubuntu4