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
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
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
C++ g++ #3	37.88	19,760	600	37.87
C++ g++	10.49	19,760	1065	41.21
Python 3 #6	1,033.31	19,312	391	1,033.27
Python 3 #4	302.37	19,312	960	1,196.45
Python 3 #8	2,259.59	19,312	414	2,259.50
n-body
source	secs	mem	gz	cpu secs
* C++ g++ #0	2.15	19,760	1933	2.15
* C++ g++ #7	4.11	19,760	1815	4.11
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
* 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
Python 3	355.06	19,312	1201	355.05
Python 3 #2	374.16	19,312	1247	374.14
Python 3 #8	518.11	19,312	1172	518.09
spectral-norm
source	secs	mem	gz	cpu secs
* C++ g++ #6	0.73	19,760	1050	2.86
* 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
Python 3 #6	347.53	19,316	334	347.52
Python 3 #4	90.52	19,308	415	359.95
Python 3 #8	379.97	19,440	334	379.96
Python 3 #7	97.11	19,316	425	380.79
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
* C++ g++ #6	0.98	35,080	1014	3.87
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
Python 3 #7	172.20	19,312	698	687.68
Python 3 #3	861.76	19,312	319	861.73
Python 3 #2	235.71	95,164	790	926.30
Python 3 #5	257.00	19,312	463	1,026.96
Python 3 #8	1,528.00	19,364	379	1,527.73
fasta
source	secs	mem	gz	cpu secs
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
C++ g++ #3	2.63	19,760	1311	2.63
C++ g++ #7	0.87	19,760	2711	3.05
C++ g++ #4	3.32	19,760	1291	3.32
C++ g++ #5	1.06	19,760	2345	3.66
C++ g++ #6	1.07	19,760	2326	4.01
Python 3 #2	39.00	19,312	1126	39.00
Python 3 #3	39.12	19,312	1007	39.12
Python 3 #5	27.86	827,284	1951	53.94
Python 3	57.21	19,312	823	57.20
Python 3 #8	156.78	19,780	738	156.35
k-nucleotide
source	secs	mem	gz	cpu secs
C++ g++ #2	2.01	156,592	1634	5.98
C++ g++ #3	4.19	165,580	1280	13.94
C++ g++	6.96	757,156	1452	14.75
Python 3 #3	50.15	262,368	1970	185.77
Python 3 #4	79.01	506,112	663	236.67
Python 3	238.45	499,072	499	237.78
Python 3 #8	238.78	623,448	525	237.93
Python 3 #9	68.33	379,392	614	238.74
reverse-complement
source	secs	mem	gz	cpu secs
* C++ g++ #2	0.74	499,916	2099	0.74
C++ g++ #6	3.30	1,517,824	1827	4.38
Python 3 #3	4.86	507,712	803	4.86
C++ g++	6.52	980,156	599	6.51
Python 3 #5	4.09	1,500,716	960	7.41
Python 3 #2	10.08	1,788,136	440	10.08
Python 3	10.29	1,986,440	484	10.29
Python 3 #6	7.38	2,484,372	821	10.89
Python 3 #4	13.41	4,002,688	343	13.41
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
C++ g++ #5	1.16	200,724	891	4.10
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
C++ g++ #4	2.22	266,136	826	5.20
C++ g++	2.65	2,153,044	760	9.23
C++ g++ #2	22.83	265,840	514	22.82
Python 3 #2	100.90	271,872	344	100.89
Python 3 #4	33.61	276,992	481	121.96
Python 3 #5	35.49	274,816	669	126.17
Python 3	36.12	276,992	597	127.68
Python 3 #3	52.28	671,872	1247	149.07
Python 3 #8	558.92	798,336	535	558.85
pidigits
source	secs	mem	gz	cpu secs
C++ g++ #4	0.71	19,760	521	0.71
* C++ g++ #5	0.73	19,760	804	0.73
* Python 3 #3	1.26	19,312	573	1.26
Python 3 #4	4.54	19,312	348	4.54
Python 3 #5		Failed
regex-redux
source	secs	mem	gz	cpu secs
C++ g++ #6	1.15	276,336	2856	2.24
* Python 3 #2	1.35	168,236	1411	2.64
Python 3	8.91	432,220	515	16.44
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
Python 3	Python 3.13.0
C++ g++	g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0