Rust versus Intel C

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
* Intel C #6	2.25	8.91	3,625	1582	4.46
* Intel C #4	13.39	13.39	2,830	1190	4.38
* Rust #6	3.81	15.06	3,985	1260	11.92
Rust #4	6.94	27.12	3,985	1026	11.71
Rust #5	7.41	28.89	3,990	1023	11.79
Intel C #5	7.77	30.80—30.95	5,378	917	4.46
* Intel C #2	8.70	34.11—34.19	3,457	1563	4.27
Intel C #3	34.59	34.60	2,896	574	4.16
Rust #2	9.19	36.04—36.08	3,723	1198	11.14
Intel C #8	42.87	42.88—43.00	2,892	483	4.15
Intel C	43.45	43.42—43.59	2,896	514	4.22
n-body
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* Intel C #9	2.04	2.04	2,966	1639	5.24
* Rust #9	2.19	1.90—3.09	3,023	1881	11.01
* Rust #7	3.24	3.24	2,937	1759	10.53
Rust #3	3.46	3.46	2,937	1774	10.62
* Intel C #4	3.64	3.63—3.69	2,933	1398	5.29
Rust #2	3.65	3.65	3,031	1809	10.49
* Rust #6	4.37	4.36—4.49	3,031	1796	10.86
* Rust #5	5.02	5.03	3,035	2224	10.61
Rust #4	5.13	4.99—5.53	3,039	1810	10.50
Rust	5.52	5.50—5.60	3,027	1483	10.84
Intel C #7	5.55	5.54—5.58	2,961	1250	4.46
* Intel C #5	5.57	5.57	2,937	1436	4.23
Intel C #8	6.01	6.06—6.10	3,039	1195	4.42
Intel C #3	6.18	6.13—6.46	2,970	1214	4.42
Intel C #6	6.20	6.23	2,970	1186	4.50
Intel C	6.24	6.26	2,970	1179	4.46
Intel C #2	6.24	6.23—6.39	2,966	1270	4.30
spectral-norm
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* Intel C #6	0.40	1.54—1.58	5,321	1203	5.45
Intel C #8	2.67	2.68	3,215	389	4.71
* Rust #6	0.72	2.85	3,981	1132	12.60
Rust #4	0.72	2.85	4,047	823	12.00
* Rust #5	0.72	2.86	4,018	1062	11.30
* Rust #2	0.72	2.86	4,145	1117	11.00
* Rust	0.72	2.86	4,104	1262	11.75
* Intel C #7	0.73	2.87	5,439	906	5.57
Intel C #3	0.73	2.87—2.92	5,399	470	4.60
* Intel C #4	0.73	2.88	5,382	1145	4.79
* Intel C #5	0.73	2.89	5,464	576	4.76
* Rust #3	0.74	2.94	4,121	1060	10.92
* Rust #7		Empty
* Intel C #2		Empty
mandelbrot
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* Rust #4	0.95	3.78	35,598	1301	12.26
* Rust #6	1.08	4.21	36,426	1338	12.65
Rust #7	1.10	4.34	35,906	763	12.32
Rust #2	1.10	4.36—4.52	35,754	770	12.80
Rust #5	1.12	4.38	36,311	725	12.27
Rust #3	1.15	4.57	14,615	1013	12.66
Intel C #9	1.83	7.27	36,909	700	4.32
Rust	2.01	7.90	42,631	874	10.94
* Intel C #7	3.14	12.40	37,278	1000	4.62
* Intel C #4	3.22	12.81—12.87	36,958	805	4.24
* Intel C	3.26	12.99	35,803	828	4.36
* Intel C #3	3.32	13.23	35,529	769	4.37
Intel C #8	23.98	23.98	2,839	412	4.38
Intel C #5		Bad Output
* Intel C #6		Empty
fasta
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Intel C #3	0.84	0.83	2,793	1469	4.71
Intel C #5	1.06	1.06	2,937	1286	4.44
Intel C #2	1.44	1.44	2,773	1299	4.29
* Rust #7	0.78	1.55	4,772	2533	11.68
Rust #3	2.03	2.03	3,199	1235	10.95
Intel C	2.93	2.93	2,945	1213	4.41
Rust #9	0.94	3.20—3.33	5,534	1952	11.24
Intel C #7	0.83	3.28	6,611	2276	4.52
Rust #2	0.95	3.46—3.50	5,554	1910	11.45
Rust #5	0.94	3.48—3.53	5,554	1963	12.19
Rust #4	3.52	3.53	128,217	944	10.63
Rust #6	3.53	3.53	128,381	959	10.62
Rust	4.45	4.54—4.61	3,113	1240	11.09
Intel C #8	7.86	7.90—7.98	2,679	839	4.23
Intel C #4		Empty
Intel C #6		Timed Out
k-nucleotide
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Rust #7	2.57	8.13—8.39	139,088	1585	13.43
Rust #3	3.28	9.72—10.13	142,631	1549	11.91
Rust #6	2.79	10.06—10.15	165,048	1697	14.10
Rust #5	3.88	11.66—11.92	143,155	1745	12.40
Intel C	6.12	13.40—13.51	134,566	1512	4.77
Rust #2	6.00	15.71—16.24	142,946	1350	11.85
Rust #9	6.33	17.72—18.82	141,099	1850	14.41
Rust #4	6.69	18.00—18.74	142,090	1755	13.13
Rust	21.08	64.42—65.12	161,219	1086	12.16
reverse-complement
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
* Intel C #7	0.45	0.64	514,732	1899	5.28
Intel C #9	0.48	0.74	514,642	1551	4.34
* Rust	0.55	0.85	512,963	2762	11.72
Rust #2	1.01	1.61	1,022,128	1332	11.04
Intel C #2	1.17	1.70	1,022,149	757	4.32
Rust #3	1.02	1.72	1,022,034	1105	11.45
Intel C #5	2.14	2.14	1,021,334	654	4.55
* Intel C #4	3.76	3.79	514,626	716	4.22
Intel C #6	1.08	4.25—4.29	750,670	828	4.27
binary-trees [ Contentious. Different approaches. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Rust #5	1.07	3.84—4.01	139,121	771	1.28
Rust #2	1.17	4.16—4.25	140,157	729	12.50
Rust #4	1.38	4.98—5.02	202,686	765	12.32
Rust #3	1.40	5.15—5.26	172,392	762	11.90
Intel C #2	1.71	5.41	176,718	816	4.92
Intel C #3	2.04	6.23	139,166	842	5.57
Rust	2.10	7.44	137,417	760	11.36
Intel C	17.90	17.93—18.09	271,843	660	4.31
Intel C #5	9.21	33.41—33.58	362,066	914	4.15
pidigits [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Rust #4	0.71	0.72	4,055	804	11.82
Intel C #2	0.74	0.74	4,506	422	4.39
Intel C	0.75	0.74	4,448	459	4.39
* Rust #2	0.75	0.75	4,387	1312	10.44
* Rust	0.75	0.75	4,243	1426	10.19
* Rust #3	0.75	0.75	4,510	1373	10.10
regex-redux [ Contentious. Different libraries. ]
	elapsed	Mean or 95% CI
source	secs	cpu secs	mem	gz	make
Rust #6	1.21	1.46	159,846	994	13.12
Rust #5	1.35	1.58	209,863	777	12.67
Rust	1.35	1.59—1.63	159,793	811	12.22
Rust #3	1.38	1.63	210,379	726	13.51
Rust #4	1.38	1.64	206,811	771	12.41
Rust #2	1.38	1.64	159,937	707	11.67
* Rust #7	0.78	2.00	157,442	2464	12.48
Intel C #5	0.90	2.89—2.93	160,592	1403	4.64
Intel C #2	3.22	3.22	107,491	1121	4.35
Intel C #4	1.06	4.08—4.13	160,281	1237	4.44
Intel C #3	1.84	4.43	110,412	1273	4.70
Rust	1.84.1 (e71f9a9a9 2025-01-27) LLVM version: 19.1.5
Intel C	Intel(R) oneAPI DPC++/C++ Compiler 2024.1.0.20240308