4fps in darkplaces master with r_shadow_shadowmapping 0
Even with all other shadow settings disabled, r_shadow_shadowmapping 1 (which can't take effect with the other shadow related settings disabled, afaik) restores the usual >=200fps that I would get in div0-stable. This is the "soft shadows" menu option. According to turbostat, the gpu becomes idle when this happens. Intel haswell "iris pro" 5200, mesa 19.1.6, debian sid.