Recent commits to the DWScript repository doubled the compiler performance when compiling many small scripts, like happens in the unit tests suites.

This started from a first profiling run where the memory allocations around the UnicodeLowerCase function came out as top bottlenecks.

Thing is, Pascal being a case-insensitive language, there are lots of case-insensitive comparisons, lookups, searches and hashes, and turns out a key hash code was computed with code like

(more…)