Free Pascal versus Ada 2012 GNAT 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
Ada 2012 GNAT #3	8.21	19,784	2120	32.46
Free Pascal	10.58	19,664	1032	42.13
n-body
source	secs	mem	gz	cpu secs
Ada 2012 GNAT #2	5.74	19,840	2623	5.74
Ada 2012 GNAT #3	5.82	19,712	1758	5.82
Ada 2012 GNAT	5.83	19,712	1624	5.83
Free Pascal	6.28	19,680	1315	6.28
Free Pascal #2	6.28	19,680	1328	6.28
Free Pascal #3	7.16	19,680	1424	7.16
Ada 2012 GNAT #5	8.99	19,712	2452	8.98
spectral-norm
source	secs	mem	gz	cpu secs
Ada 2012 GNAT #4	0.75	19,844	2777	2.85
Ada 2012 GNAT	5.36	19,716	725	5.35
Free Pascal #3	1.44	19,824	632	5.70
Free Pascal #2	1.45	19,696	548	5.71
Ada 2012 GNAT #3	1.47	19,844	1725	5.72
Free Pascal	11.77	19,696	429	11.77
mandelbrot
source	secs	mem	gz	cpu secs
Ada 2012 GNAT #3	3.92	36,736	1825	15.43
Free Pascal #8	3.90	33,024	958	15.47
Free Pascal #7	6.55	36,992	930	26.05
Free Pascal #3	26.52	19,680	533	26.52
Ada 2012 GNAT #2	28.26	19,712	583	28.26
Free Pascal #2	10.96	33,024	833	29.39
Free Pascal	10.98	33,024	833	29.41
Free Pascal #6	7.45	36,096	788	29.64
pidigits
source	secs	mem	gz	cpu secs
Free Pascal #3	0.87	19,824	493	0.87
Ada 2012 GNAT #2	0.88	19,712	1137	0.88
Free Pascal #2	5.36	19,696	802	5.36
Ada 2012 GNAT	5.36	19,712	1163	5.36
Free Pascal	14.63	19,696	3054	14.63
regex-redux
source	secs	mem	gz	cpu secs
Free Pascal	5.51	103,016	1300	5.51
Ada 2012 GNAT #5	4.90	152,628	3647	13.63
Ada 2012 GNAT #6		Bad Output
fasta
source	secs	mem	gz	cpu secs
Ada 2012 GNAT #5	2.56	19,660	2220	2.56
Ada 2012 GNAT #2	2.58	19,668	2158	2.58
Free Pascal #6	5.58	19,676	1196	5.58
Free Pascal #5	5.64	19,792	1225	5.64
Ada 2012 GNAT	6.28	19,664	1381	6.28
k-nucleotide
source	secs	mem	gz	cpu secs
Ada 2012 GNAT #2	6.75	259,564	4911	13.58
reverse-complement
source	secs	mem	gz	cpu secs
Ada 2012 GNAT #2	2.26	821,912	3285	2.58
Free Pascal #2	3.77	525,048	773	3.77
Ada 2012 GNAT	12.53	528,356	943	12.53
binary-trees
source	secs	mem	gz	cpu secs
Free Pascal #5	2.09	132,608	929	4.98
Free Pascal #6	2.09	132,608	939	4.99
Free Pascal #7	2.12	132,608	975	5.07
Ada 2012 GNAT #4	3.48	202,880	2117	10.05
Ada 2012 GNAT	20.98	266,240	896	20.97
Ada 2012 GNAT #3	9.72	529,280	1275	32.90
Free Pascal	Free Pascal Compiler version 3.2.2 [2021/05/16]
Ada 2012 GNAT	GNATMAKE 12.3.0