Some benchmark results for various combinations of hardware, Gforth version, and Gforth configuration. You can measure your combination with `make bench'. You can find a table comparing Gforth with four interpretive Forth systems in the manual (Section Performance), and a comparison with more systems in http://www.complang.tuwien.ac.at/pub/papers/ertl&maierhofer95.ps.gz. All times are given in seconds of user time. siev bubble matrix fib machine and configuration 10.99 12.13 11.34 13.13 Pentium 133MHz 256K PB cache; gcc-2.6.3 -DFORCE_REG; gforth-0.1beta 31.90 35.60 28.30 36.70 i486 66MHz 256K cache; gcc-2.6.3 -DFORCE_REG; gforth-0.1alpha 39.50 45.91 36.73 44.90 i486 50MHz 256K cache; gcc-2.7.0 -DFORCE_REG -DDIRECT_THREADED; gforth-0.1beta 42.82 46.74 38.69 48.30 i486 50MHz 256K cache; gcc-2.7.0 -DFORCE_REG; gforth-0.1beta 8.4 8.3 7.2 9.4 21064A (Alpha) 300MHz 2M cache; gcc-2.7.1; gforth-0.1beta 17.3 19.0 14.1 18.3 R4000 100MHz 1M cache; gcc-2.4.5; gforth-0.1beta 50.9 56.8 42.4 52.0 R3000 25MHz 64K+64K cache; gcc-2.5.8 -DFORCE_REG; gforth-0.1beta 63.0 73.3 74.6 65.7 FJMB86903 (SPARC ELC) 33MHz; gcc-2.5.8; gforth-0.1beta 30.0 34.1 20.5 33.0 PA-RISC 1.1 50MHz 64K cache; gcc-2.6.3 -DDIRECT_THREADED; gforth-0.1beta