PERF: Improve typing in ckdtree
PERF: Improve typing in ckdtree

matthew-brett/scipy,mdhaber/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,Eric89GXL/scipy,perimosocordiae/scipy,e-q/scipy,WarrenWeckesser/scipy,Eric89GXL/scipy,Stefan-Endres/scipy,zerothi/scipy,grlee77/scipy,Stefan-Endres/scipy,scipy/scipy,Stefan-Endres/scipy,endolith/scipy,ilayn/scipy,e-q/scipy,andyfaff/scipy,zerothi/scipy,rgommers/scipy,perimosocordiae/scipy,Eric89GXL/scipy,nmayorov/scipy,grlee77/scipy,vigna/scipy,Eric89GXL/scipy,perimosocordiae/scipy,zerothi/scipy,vigna/scipy,WarrenWeckesser/scipy,ilayn/scipy,mdhaber/scipy,nmayorov/scipy,perimosocordiae/scipy,anntzer/scipy,andyfaff/scipy,zerothi/scipy,endolith/scipy,anntzer/scipy,e-q/scipy,andyfaff/scipy,Stefan-Endres/scipy,mdhaber/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,ilayn/scipy,perimosocordiae/scipy,anntzer/scipy,nmayorov/scipy,mdhaber/scipy,scipy/scipy,matthew-brett/scipy,anntzer/scipy,vigna/scipy,scipy/scipy,andyfaff/scipy,WarrenWeckesser/scipy,mdhaber/scipy,andyfaff/scipy,anntzer/scipy,grlee77/scipy,matthew-brett/scipy,rgommers/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,endolith/scipy,anntzer/scipy,nmayorov/scipy,andyfaff/scipy,endolith/scipy,zerothi/scipy,vigna/scipy,scipy/scipy,grlee77/scipy,endolith/scipy,tylerjereddy/scipy,zerothi/scipy,WarrenWeckesser/scipy,endolith/scipy,grlee77/scipy,matthew-brett/scipy,ilayn/scipy,vigna/scipy,ilayn/scipy,matthew-brett/scipy,mdhaber/scipy,scipy/scipy,e-q/scipy,Eric89GXL/scipy,rgommers/scipy,rgommers/scipy,ilayn/scipy,Eric89GXL/scipy,e-q/scipy,nmayorov/scipy,rgommers/scipy,scipy/scipy,tylerjereddy/scipy,tylerjereddy/scipy,tylerjereddy/scipy