Python 3 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
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #6	3.33	5,800	1535	13.12
* C++ g++ #7	14.06	2,449	1156	14.04—14.11
C++ g++ #5	7.86	5,792	987	30.74—30.81
C++ g++ #4	8.91	5,710	1445	35.02—35.44
C++ g++ #2	9.14	5,698	1446	35.90—36.24
C++ g++ #3	37.89	2,351	600	37.91—37.98
C++ g++	10.53	5,534	1065	41.27—41.53
Python 3 #6	943.88	11,874	391	942.63
Python 3 #4	311.18	28,701	960	1,221.85
Python 3 #8	2,457.09	11,874	414	2,455.59
n-body
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #0	2.15	2,417	1933	2.16
* C++ g++ #7	4.09	5,124	1815	4.13—4.16
C++ g++ #9	5.15	2,486	1536	5.17
C++ g++ #3	5.33	2,482	1402	5.34
* C++ g++ #4	5.46	2,482	1434	5.46
* C++ g++ #2	6.02	2,490	1524	6.02—6.10
C++ g++ #5	6.33	2,478	1544	6.35
C++ g++	6.62	2,499	1666	6.64
C++ g++ #6	6.94	2,499	1674	6.94—6.97
Python 3	372.41	12,198	1201	371.23
Python 3 #2	442.06	12,554	1247	440.87
Python 3 #8	529.38	12,497	1172	528.16
spectral-norm
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #6	0.72	3,981	1050	2.86
* C++ g++ #5	1.33	5,820	1050	5.28
C++ g++	5.34	5,292	459	5.34
C++ g++ #7	1.53	4,071	1284	6.07
Python 3 #6	349.68	13,660	334	348.48
Python 3 #4	90.37	34,693	415	352.91
Python 3 #8	386.45	12,833	334	385.07
Python 3 #7	109.91	34,578	425	421.84
mandelbrot
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #4	0.89	37,941	3554	3.46
* C++ g++	0.90	37,626	1797	3.48
* C++ g++ #6	0.98	37,908	1014	3.87
C++ g++ #0	2.36	38,281	2752	9.31
* C++ g++ #7	4.87	38,048	749	13.30
C++ g++ #5	13.47	36,884	596	13.49
C++ g++ #9	3.53	37,863	732	13.59
C++ g++ #2	16.96	36,704	700	16.96
C++ g++ #3	27.38	5,181	421	27.38
Python 3 #7	182.94	62,173	698	723.28
Python 3 #3	879.41	45,085	319	877.96
Python 3 #2	237.64	230,973	790	937.87
Python 3 #5	260.63	61,620	463	1,033.16
Python 3 #8	1,577.29	45,031	379	1,575.80
fasta
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #9	0.78	6,214	2758	1.56
C++ g++ #2	1.85	5,108	1129	1.85
C++ g++	1.93	5,104	1064	1.93
C++ g++ #3	2.63	5,284	1311	2.63
C++ g++ #7	0.88	6,304	2711	3.06
C++ g++ #4	3.34	2,363	1291	3.34
C++ g++ #5	1.07	7,012	2345	3.69—3.73
C++ g++ #6	1.08	7,127	2326	3.90
Python 3 #3	39.03	12,218	1007	38.87—47.23
Python 3 #2	39.06	12,415	1126	39.10—46.32
Python 3 #5	27.95	1,190,347	1951	54.25—54.92
Python 3	57.39	12,100	823	57.48—65.23
Python 3 #8	153.17	11,915	738	154.06—158.15
k-nucleotide
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #2	2.02	162,349	1634	6.08—6.51
C++ g++ #3	4.19	171,622	1280	13.87—14.40
C++ g++	7.04	778,510	1452	15.20—15.66
Python 3 #3	46.55	674,185	1970	182.63—187.07
Python 3 #4	76.67	523,751	663	233.38—238.93
Python 3 #8	234.08	642,265	525	235.45—236.80
Python 3	234.20	515,047	499	235.22—237.04
Python 3 #9	66.67	392,184	614	236.55—238.32
reverse-complement
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
* C++ g++ #2	0.76	514,101	2099	0.76
Python 3 #3	4.96	523,801	803	4.95
C++ g++	6.55	1,006,805	599	6.55—6.67
Python 3 #5	4.18	2,418,156	960	7.46—7.50
Python 3 #2	10.09	1,837,285	440	10.14—10.23
Python 3	10.43	2,040,713	484	10.44—10.58
Python 3 #6	7.59	2,795,930	821	11.07—11.11
Python 3 #4	13.47	4,109,324	343	13.47—13.85
C++ g++ #5	37.66	792,846	704	37.65—37.69
C++ g++ #6		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	3.47—3.61
C++ g++ #5	1.17	208,171	891	4.13—4.16
C++ g++ #9	1.76	140,571	815	4.67—4.81
C++ g++ #6	1.93	273,973	851	4.91—5.08
C++ g++ #3	2.28	273,715	951	5.06—5.10
C++ g++ #4	2.22	273,977	826	5.21—5.32
C++ g++	2.69	1,896,727	760	9.44—9.51
C++ g++ #2	22.77	274,080	514	22.83—23.04
Python 3 #2	100.49	281,829	344	100.71—101.07
Python 3 #4	33.37	460,771	481	121.34—121.66
Python 3	34.85	445,649	597	123.14—123.93
Python 3 #5	35.37	806,117	669	125.73—126.09
Python 3 #3	51.88	819,077	1247	148.97—149.82
Python 3 #8	560.84	821,846	535	559.59
pidigits
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #4	0.72	6,496	521	0.72
* C++ g++ #5	0.73	6,300	804	0.73
* Python 3 #3	1.35	20,009	573	1.28—1.32
Python 3 #4	4.63	12,718	348	4.60
Python 3 #5		Empty
regex-redux
	elapsed			Mean or 95% CI
source	secs	mem	gz	cpu secs
C++ g++ #6	1.14	285,639	2856	2.25
* Python 3 #2	1.41	191,300	1411	2.65
Python 3	8.96	459,624	515	16.49—16.73
C++ g++ #3	12.37	222,614	859	18.07—18.64
C++ g++		Empty
C++ g++ #2		Empty
C++ g++ #5		Empty
C++ g++ #4		Empty
Python 3	Python 3.13.0
C++ g++	g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0