Some notes on standards compliance level:
| Compiler | C standard | C++ standard |
|---|---|---|
| gcc-ia16 6.3.0 | C11 | C++14 (Tiny/Small memory only) |
| OpenWatcom | C90 (limited C99) | limited C++98 |
| Digital Mars | C99 | C++98 |
| Compiler | Flags | DOSBox (3000 cycles) | 86Box (80286 @ 8MHz) | 86Box (80286 @ 8MHz, 286-tuned compile) |
|---|---|---|---|---|
| gcc-ia16 6.3.0 (July 2022) | -O0 | 3329.2 | 1910.1 | 1935.6 |
| gcc-ia16 6.3.0 (July 2022) | -O1 | 6332.9 | 3273.3 | 3255.0 |
| gcc-ia16 6.3.0 (July 2022) | -O2 | 6935.4 | 3640.9 | 3664.3 |
| gcc-ia16 6.3.0 (July 2022) | -O3 | 6936.9 | 3641.3 | 3664.3 |
| gcc-ia16 6.3.0 (July 2022) | -Os | 5066.5 | 2697.5 | 2722.5 |
| OpenWatcom (Jun 25 2022) | 4046.0 | 2198.6 | 2240.7 | |
| OpenWatcom (Jun 25 2022) | -oneatx -oh | 5496.4 | 3066.3 | 3183.4 |
| Digital Mars C 8.57 | 4221.6 | 2339.2 | 2437.2 | |
| Digital Mars C 8.57 | -o | 4481.8 | 2635.9 | 2721.1 |
dccb is a software 3D rasterizer, designed to test real-world performance across a variety of C DOS compilers.
Test performed by leikareipa.
| Result (FPS) | Compiler |
|---|---|
| 57 | Microsoft C/C++ 8 |
| 41 | Digital Mars C/C++ 8 |
| 37 | Open Watcom ? |
| 33 | Borland Turbo C 2 |
| 32 | Borland C++ 2 |
| 32 | Microsoft C 5 |
| 31 | Microsoft QuickC 1 |
| 30 | HI-TECH Pacific C 7 |
| 14 | Mix Power C 2.2 |
FreeDOS kernel (2022-06-04):