Ada 2005 GNAT vs C++ g++ | Computer Language Benchmarks Game

1 : Are the Ada 2005 GNAT programs faster? At a glance.

Each chart bar shows, for one unidentified benchmark, how much the fastest Ada 2005 GNAT program used compared to the fastest C++ g++ program.

These are not the only compilers and interpreters. These are not the only programs that could be written. These are not the only tasks that could be solved. These are just 10 tiny examples.

2 : Are the Ada 2005 GNAT programs faster? Approximately.

Each table row shows, for one named benchmark, how much the fastest Ada 2005 GNAT program used compared to the fastest C++ g++ program.

Ada 2005 GNAT used what fraction? used how many times more?
Benchmark	Time	Memory	Code
binary-trees	±	¹/₂	2×
fannkuch-redux	±	2×	±
spectral-norm	±	4×	3×
fasta	±	±	2×
pidigits	±	±	2×
reverse-complement †	±	±	±
mandelbrot	±	±	2×
fasta-redux	±	2×	±
regex-dna	±	¹/₂	5×
n-body	2×	2×	±
k-nucleotide	2×	2×	4×

Ada 2005 GNAT used what fraction? used how many times more?
Time-used	\|-	\|---	25%	median	75%	---\|	-\|
(Elapsed secs)	±	±	±	±	±	2×	2×

† possible mismatch - one-core program compared to multi-core program.

± read the measurements and then read the program source code.

3 : Are the Ada 2005 GNAT programs faster? Measurements.

These are not the only tasks that could be solved. These are just 10 tiny examples. These are not the only compilers and interpreters. These are not the only programs that could be written.

For each named benchmark, measurements of the fastest Ada 2005 GNAT program are shown for comparison against measurements of the fastest C++ g++ program.

Program Source Code	CPU secs	Elapsed secs	Memory KB	Code B	≈ CPU Load
binary-trees
Ada 2005 GNAT	20.11	6.20	176,860	2167	82% 79% 76% 92%
C++ g++	32.34	9.25	360,404	892	89% 79% 95% 88%
fannkuch-redux
Ada 2005 GNAT	38.18	9.58	1,976	2100	100% 100% 100% 100%
C++ g++	47.95	12.29	1,236	1440	100% 93% 100% 98%
spectral-norm
Ada 2005 GNAT	7.89	2.01	1,940	2762	98% 99% 99% 99%
C++ g++	10.02	2.52	492	1044	100% 100% 100% 100%
fasta
Ada 2005 GNAT	4.05	4.06	1,500	2186	1% 0% 100% 0%
C++ g++	4.16	4.16	1,072	1286	0% 0% 100% 0%
pidigits
Ada 2005 GNAT	2.29	2.29	2,076	1254	0% 0% 100% 0%
C++ g++	2.29	2.30	1,648	682	0% 0% 0% 100%
reverse-complement
Ada 2005 GNAT	0.94	0.79	197,376	3220	82% 0% 0% 36% †
C++ g++	1.22	0.77	245,692	2275	12% 55% 49% 46% †
mandelbrot
Ada 2005 GNAT	22.74	5.75	30,144	1805	99% 99% 99% 98%
C++ g++	19.29	5.01	32,288	726	95% 99% 96% 95%
fasta-redux
Ada 2005 GNAT	2.03	2.03	1,500	1909	0% 0% 1% 100%
C++ g++	1.70	1.71	832	1474	0% 0% 1% 100%
regex-dna
Ada 2005 GNAT	17.85	5.67	97,988	3492	77% 69% 93% 77%
C++ g++	5.83	4.10	173,632	695	0% 60% 82% 0%
n-body
Ada 2005 GNAT	15.43	15.44	1,504	2427	86% 0% 0% 14%
C++ g++	10.07	10.07	828	1763	0% 0% 1% 100%
k-nucleotide
Ada 2005 GNAT	36.22	13.19	256,144	4865	49% 42% 100% 84%
C++ g++	25.89	7.79	155,916	1252	78% 80% 78% 98%

† possible mismatch - one-core program compared to multi-core program.

4 : Are there other Ada 2005 GNAT programs for these benchmarks?

Remember - those are just the fastest Ada 2005 GNAT and C++ g++ programs measured on this OS/machine. Check if there are other implementations of these benchmark programs for Ada 2005 GNAT.

Maybe one of those other Ada 2005 GNAT programs is fastest on a different OS/machine.

5 : Are there other faster programs for these benchmarks?

Remember - those are just the fastest Ada 2005 GNAT and C++ g++ programs measured on this OS/machine. Check if there are faster implementations of these benchmark programs for other programming languages.