Improve performance of sparse.block_diag
Improve performance of sparse.block_diag

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