improved my fractal formula compiler to reduce one Burning Ship benchmark from 21.5s to 20.5s \o/
then I upgraded gcc-mingw to version 7 (was 6.3 before) and it slowed down again to 22.5s /o\
quite literally, 1 step forward 2 steps backward
now throwing more -Ofast at it to see if it helps...
I think I'll punt these compiler changes to a future `kf-2.15` branch, the generated code for reference and perturbation iterations is just not good enough yet.
Would be nice though, adding a formula would become 2 lines of code, and the huge formula.cpp generated from the semi-automatically crafted formula.xml via formua.xsl takes a long time to compile, at least the generated code is split into many files so it can be compiled in parallel...
Hopefully will manage to release `kf-2.14.4` today with some less invasive changes.