C++ g++ versus Rust 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	3.31	19,760	1535	13.11
* C++ g++ #7	14.03	19,760	1156	14.03
* 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	7.85	19,760	987	30.68
C++ g++ #4	8.92	19,760	1445	35.00
C++ g++ #2	9.13	19,760	1446	35.73
Rust #2	9.15	19,804	1198	35.90
C++ g++ #3	37.88	19,760	600	37.87
C++ g++	10.49	19,760	1065	41.21
n-body
source	secs	mem	gz	cpu secs
* C++ g++ #0	2.15	19,760	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	4.11	19,760	1815	4.11
* Rust #6	4.30	19,804	1796	4.30
Rust #3	4.49	19,352	1774	4.49
* Rust #5	5.01	19,804	2224	5.01
Rust #4	5.10	19,804	1810	5.10
C++ g++ #9	5.14	19,760	1536	5.14
C++ g++ #3	5.32	19,760	1402	5.32
* C++ g++ #4	5.45	19,760	1434	5.45
Rust	5.51	19,804	1483	5.51
* C++ g++ #2	6.02	19,352	1524	6.01
C++ g++ #5	6.32	19,760	1544	6.32
C++ g++	6.61	19,760	1666	6.61
C++ g++ #6	6.93	19,760	1674	6.93
spectral-norm
source	secs	mem	gz	cpu secs
* 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
* C++ g++ #6	0.73	19,760	1050	2.86
* 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	19,760	1050	5.28
C++ g++	5.33	19,760	459	5.33
C++ g++ #7	1.52	19,512	1284	6.04
* Rust #7		Make Error
mandelbrot
source	secs	mem	gz	cpu secs
* C++ g++ #4	0.89	35,344	3554	3.45
* C++ g++	0.89	34,952	1797	3.47
* Rust #4	0.94	33,408	1301	3.73
* C++ g++ #6	0.98	35,080	1014	3.87
Rust #2	1.07	33,592	770	4.23
* 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	2.35	35,476	2752	9.30
* C++ g++ #7	4.86	35,176	749	13.28
C++ g++ #5	13.44	34,636	596	13.43
C++ g++ #9	3.52	35,120	732	13.55
C++ g++ #2	16.95	34,636	700	16.94
C++ g++ #3	27.37	19,760	421	27.36
fasta
source	secs	mem	gz	cpu secs
* Rust #7	0.77	19,804	2533	1.54
C++ g++ #9	0.78	19,352	2758	1.54
C++ g++ #2	1.84	19,760	1129	1.84
C++ g++	1.92	19,760	1064	1.92
Rust #3	1.98	19,804	1235	1.97
C++ g++ #3	2.63	19,760	1311	2.63
C++ g++ #7	0.87	19,760	2711	3.05
Rust #2	0.92	19,932	1910	3.09
Rust #9	0.93	19,352	1952	3.13
Rust #5	0.94	19,932	1963	3.14
C++ g++ #4	3.32	19,760	1291	3.32
Rust #6	3.46	123,652	959	3.45
Rust #4	3.57	123,652	944	3.57
C++ g++ #5	1.06	19,760	2345	3.66
C++ g++ #6	1.07	19,760	2326	4.01
Rust	4.24	19,804	1240	4.24
k-nucleotide
source	secs	mem	gz	cpu secs
C++ g++ #2	2.01	156,592	1634	5.98
Rust #7	2.84	133,840	1585	8.91
Rust #6	2.96	159,600	1697	10.67
Rust #3	3.52	137,568	1549	10.78
Rust #5	3.96	137,844	1745	11.95
C++ g++ #3	4.19	165,580	1280	13.94
C++ g++	6.96	757,156	1452	14.75
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	0.74	499,916	2099	0.74
* 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	3.30	1,517,824	1827	4.38
C++ g++	6.52	980,156	599	6.51
C++ g++ #5	37.59	771,632	704	37.58
C++ g++ #3		Bad Output
binary-trees
source	secs	mem	gz	cpu secs
C++ g++ #7	0.97	201,512	896	3.40
Rust #5	1.08	198,656	771	3.77
C++ g++ #5	1.16	200,724	891	4.10
Rust #2	1.22	199,684	729	4.29
C++ g++ #9	1.74	136,120	815	4.63
C++ g++ #3	1.91	265,636	951	4.74
C++ g++ #6	1.91	266,120	851	4.77
Rust #4	1.33	187,948	765	4.80
Rust #3	1.40	188,740	762	5.06
C++ g++ #4	2.22	266,136	826	5.20
Rust	2.05	132,992	760	7.21
C++ g++	2.65	2,153,044	760	9.23
C++ g++ #2	22.83	265,840	514	22.82
pidigits
source	secs	mem	gz	cpu secs
C++ g++ #4	0.71	19,760	521	0.71
Rust #4	0.71	19,804	804	0.71
* C++ g++ #5	0.73	19,760	804	0.73
* 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
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	1.15	276,336	2856	2.24
C++ g++ #3	12.38	215,640	859	17.95
C++ g++		Make Error
C++ g++ #2		Make Error
C++ g++ #5		Make Error
C++ g++ #4		Make Error
C++ g++	g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0
Rust	1.80.1 (3f5fd8dd4 2024-08-06) LLVM version: 18.1.7