Ada 2012 GNAT versus C gcc fastest programs Always look at the source code. These are only the fastest programs. Look at the other programs. They may seem more-like a fair comparison to you. pidigits source secs mem gz busy cpu load Ada 2012 GNAT 1.75 4,600 1130 1.79 0% 2% 1% 100% C gcc 1.75 2,608 452 1.80 67% 0% 2% 33% spectral-norm source secs mem gz busy cpu load Ada 2012 GNAT 2.00 4,248 2770 7.88 99% 98% 99% 99% C gcc 1.98 988 569 7.89 99% 99% 100% 99% fannkuch-redux source secs mem gz busy cpu load Ada 2012 GNAT 10.23 4,332 2113 40.80 100% 100% 100% 100% C gcc 8.73 696 910 34.46 100% 95% 100% 100% n-body source secs mem gz busy cpu load Ada 2012 GNAT 9.71 1,784 2617 9.89 1% 0% 100% 1% C gcc 7.30 8 1391 7.41 0% 1% 100% 0% reverse-complement source secs mem gz busy cpu load Ada 2012 GNAT 4.05 789,068 3283 4.64 40% 1% 72% 1% C gcc 1.92 551,900 820 2.58 20% 99% 14% 1% k-nucleotide source secs mem gz busy cpu load Ada 2012 GNAT 10.22 258,500 4908 23.76 37% 19% 89% 87% C gcc 4.84 130,192 1506 16.00 98% 83% 63% 87% binary-trees source secs mem gz busy cpu load Ada 2012 GNAT 9.82 202,292 2107 33.89 84% 94% 82% 85% C gcc 3.59 168,896 809 11.86 77% 74% 98% 82% fasta source secs mem gz busy cpu load Ada 2012 GNAT 4.18 1,784 2153 4.25 95% 0% 0% 6% C gcc 1.46 2,948 2268 5.84 100% 99% 100% 99% mandelbrot source secs mem gz busy cpu load Ada 2012 GNAT 5.60 35,640 1819 22.24 100% 99% 99% 99% C gcc 1.64 27,024 1135 6.53 99% 99% 100% 100% regex-redux source secs mem gz busy cpu load Ada 2012 GNAT 7.02 154,252 3640 19.93 59% 61% 84% 79% C gcc 1.42 152,192 1397 3.40 100% 48% 48% 44% Ada 2012 GNAT GNATMAKE 9.3.0 gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0 C gcc gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0 all Ada 2012 GNAT programs & measurements all C gcc programs & measurements