refactor annotate for ~10% speedup.
refactor annotate for ~10% speedup.

bgruening/gemini,arq5x/gemini,heuermh/gemini,bw2/gemini,brentp/gemini,xuzetan/gemini,xuzetan/gemini,bgruening/gemini,xuzetan/gemini,udp3f/gemini,udp3f/gemini,bpow/gemini,bgruening/gemini,xuzetan/gemini,brentp/gemini,bgruening/gemini,bw2/gemini,udp3f/gemini,arq5x/gemini,udp3f/gemini,bpow/gemini,bpow/gemini,arq5x/gemini,heuermh/gemini,bw2/gemini,heuermh/gemini,brentp/gemini,bw2/gemini,bpow/gemini,arq5x/gemini,heuermh/gemini,brentp/gemini