Rust versus C gcc 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 gcc #6	2.17	19,684	1582	8.56
C gcc #4	14.21	19,684	1190	14.21
Rust #6	3.92	19,072	1260	15.36
Rust #4	6.96	19,072	1026	27.18
C gcc #5	6.98	19,684	917	27.28
Rust #5	7.72	19,072	1023	30.41
Rust #2	9.42	19,072	1198	36.90
C gcc #3	39.56	19,684	574	39.56
C gcc	42.31	19,684	514	42.31
C gcc #2	10.85	19,684	1563	42.52
n-body
source	secs	mem	gz	cpu secs
C gcc #9	2.10	19,704	1639	2.10
Rust #9	2.17	19,072	1881	2.17
Rust #7	3.24	19,072	1759	3.24
C gcc #8	3.70	19,684	1398	3.69
Rust #2	3.94	19,072	1809	3.94
Rust #6	4.31	19,072	1796	4.30
C gcc #4	4.31	19,684	1496	4.31
Rust #8	4.49	19,072	1774	4.49
C gcc #6	4.97	19,684	1186	4.97
Rust #5	5.01	19,072	2224	5.01
Rust #4	5.17	19,072	1810	5.17
C gcc	5.18	19,684	1179	5.18
C gcc #2	5.20	19,684	1270	5.20
C gcc #3	5.24	19,684	1214	5.24
C gcc #5	5.43	19,684	1436	5.43
Rust	5.51	19,072	1483	5.51
Rust #3	5.55	19,072	1546	5.55
C gcc #7	6.82	19,684	1250	6.82
spectral-norm
source	secs	mem	gz	cpu secs
C gcc #6	0.39	19,724	1203	1.54
Rust #6	0.72	19,076	1132	2.85
Rust #4	0.72	19,076	823	2.85
Rust #5	0.72	19,076	1062	2.85
C gcc #4	0.72	19,724	1145	2.85
Rust #7	0.72	19,076	938	2.85
C gcc #7	0.72	19,724	906	2.85
C gcc #5	0.72	19,708	576	2.86
Rust #2	0.78	19,076	1117	3.03
Rust	0.79	19,076	1262	3.04
Rust #3	0.92	19,076	1060	3.57
C gcc	5.39	19,724	390	5.39
C gcc #3	1.43	19,708	470	5.70
C gcc #8		Make Error
mandelbrot
source	secs	mem	gz	cpu secs
Rust #4	0.94	33,280	1301	3.73
Rust #6	1.08	34,048	1338	4.22
Rust #7	1.06	33,280	763	4.22
Rust #8	1.06	33,280	770	4.22
Rust #5	1.13	33,792	725	4.45
Rust #3	1.14	19,072	1013	4.54
C gcc #6	1.29	33,408	1147	5.13
C gcc #8	1.63	33,536	788	6.31
Rust	2.03	39,168	874	7.89
C gcc #4	3.49	33,152	805	13.88
C gcc #7	3.50	33,280	1000	13.91
C gcc	3.50	32,768	828	13.93
C gcc #3	3.53	32,768	769	14.09
C gcc #9	4.23	33,280	700	16.34
C gcc #2	25.05	19,684	412	25.04
pidigits
source	secs	mem	gz	cpu secs
Rust #4	0.71	19,076	804	0.71
Rust #3	0.74	19,076	1373	0.74
Rust	0.74	19,076	1426	0.74
Rust #2	0.75	19,076	1312	0.75
C gcc #2	0.82	19,704	422	0.82
C gcc	0.89	19,704	459	0.88
regex-redux
source	secs	mem	gz	cpu secs
Rust #6	1.19	153,456	994	1.45
Rust #5	1.31	202,588	777	1.56
Rust	1.34	153,776	811	1.58
Rust #4	1.34	199,540	771	1.60
Rust #2	1.35	153,780	707	1.60
Rust #3	1.36	202,904	726	1.62
Rust #7	0.78	151,040	2464	1.99
C gcc #5	0.81	152,392	1403	2.03
C gcc #2	3.21	103,296	1121	3.21
C gcc #4	0.95	152,248	1237	3.27
C gcc #3	1.73	103,680	1273	3.31
fasta
source	secs	mem	gz	cpu secs
C gcc #9	0.78	19,684	1469	0.78
C gcc #5	1.24	19,684	1286	1.24
Rust #7	0.77	19,072	2533	1.54
Rust #3	1.99	19,072	1235	1.99
C gcc #6	0.94	19,684	1936	2.77
C gcc #8	2.79	19,684	1299	2.79
C gcc #4	3.03	19,684	1244	3.03
Rust #8	0.92	19,072	1952	3.11
C gcc #2	0.82	19,684	2276	3.25
C gcc #7	0.84	19,684	2018	3.27
Rust #5	0.93	19,072	1963	3.37
Rust #2	0.94	19,072	1910	3.37
Rust #6	3.47	123,656	959	3.46
Rust #4	3.58	123,656	944	3.58
C gcc	3.74	19,684	1213	3.74
Rust	4.21	19,072	1240	4.21
C gcc #3	4.56	19,684	825	4.56
k-nucleotide
source	secs	mem	gz	cpu secs
Rust #7	2.84	133,808	1585	8.92
Rust #8	3.55	137,360	1549	10.66
Rust #6	3.00	159,596	1697	10.88
Rust #5	3.96	137,896	1745	11.92
C gcc	3.98	130,432	1512	12.93
Rust #2	6.37	137,736	1350	16.21
Rust #9	6.36	135,720	1850	17.37
Rust #4	6.64	137,260	1755	17.99
Rust	22.12	157,252	1086	66.01
reverse-complement
source	secs	mem	gz	cpu secs
C gcc #7	0.43	499,928	1899	0.59
C gcc #8	0.49	499,868	1551	0.81
Rust	0.53	498,816	2762	0.83
C gcc #6	0.97	696,664	828	1.39
C gcc #5	1.52	994,176	654	1.52
C gcc #2	1.05	994,560	757	1.57
Rust #2	0.96	995,072	1332	1.59
Rust #3	0.98	995,200	1105	1.70
C gcc #4	3.68	500,480	716	3.68
binary-trees
source	secs	mem	gz	cpu secs
Rust #5	1.05	198,528	771	3.67
Rust #2	1.20	199,556	729	4.26
C gcc #2	1.57	169,216	816	4.48
C gcc #3	1.92	134,400	842	4.70
Rust #4	1.35	198,900	765	4.88
Rust #3	1.43	193,728	762	5.15
Rust	2.07	132,736	760	7.36
C gcc	21.32	264,064	660	21.32
C gcc #5	8.66	351,232	914	31.56
Rust	1.79.0 (129f3b996 2024-06-10) LLVM version: 18.1.7
C gcc	13.2.0-23ubuntu4