Ignore the big spike. Occasionally, there are going to be noise spikes in the data. UCE runs at 336MHz. Unfortunately, Sicstus Prolog 3.7.1 only supports compactcode on Linux. This is the default unless SICStus Prolog has been installed with support for fastcode compilation.
Compilation produces native machine instructions.
Currently only available for 68K, Sparc and MIPS platforms, but not for Muse. Fastcode runs about 3 times faster than compactcode. This is the default if SICStus Prolog has been installed with support for fastcode compilation.