Fix performance of n-n push, <<, concat
Fix performance of n-n push, <<, concat

rafaelgaspar/mongoid,greggroth/mongoid,aleksclark/mongoid,ErisExchange/mongoid,rinmu/mongoid,Azzurrio/mongoid,kcdragon/mongoid,500px/mongoid,nviennot/mongoid,hbakhtiyor/mongoid,balauru/mongoid,mikerobe/mongoid,estolfo/mongoid,dbkbali/mongoid,sivagollapalli/mongoid,wuboy0307/mongoid,aj0strow/mongoid,ElvinEfendi/mongoid,krasnoukhov/mongoid,balauru/mongoid,johnnyshields/mongoid,hashrocketeer/mongoid,fbernier/mongoid,xentek/mongoid,amw/mongoid,uniiverse/mongoid,praecipula/mongoid,kentaroi/mongoid,CIRCUITLLC/mongoid,razum2um/mongoid,kevinmarvin/mongoid,codedogfish/mongoid,trmmy/mongoid,rafaelgaspar/mongoid,eljojo/mongoid,dbkbali/mongoid,canvas-drw/mongoid,lawrencecurtis/mongoid,jtescher/mongoid,tricknotes/mongoid,kslazarev/mongoid,evendis/mongoid,apptentive-engineering/mongoid,simi/mongoid,timgluz/mongoid,skiz/mongoid,dannguyen/mongoid,akm/mongoid,robwil/mongoid,hadees/mongoid,Winslett/mongoid,lackac/mongoid,grossws/mongoid,jordelver/mongoid,tombruijn/mongoid,itbakery/mongoid,cao7113/mongoid,tombruijn/mongoid,drfeelngood/mongoid,mschulkind/mongoid,camallen/mongoid,skiz/mongoid,rinmu/mongoid,mongodb/mongoid,afeld/mongoid,rpocklin/mongoid,socialreferral/mongoid,greggroth/mongoid,evendis/mongoid,sepastian/mongoid,tzar/mongoid,X0nic/mongoid,franc/mongoid,mongodb/mongoid,hxx/mongoid,flada-auxv/mongoid,rogerz42892/mongoid,akm/mongoid,xentek/mongoid,janroesner/mongoid,sivagollapalli/mongoid,etomic/mongoid,flada-auxv/mongoid,Spaceghost/mongoid,canvas-drw/mongoid,spiegela/mongoid,kostyantyn/mongoid,abezzub/mongoid,drfeelngood/mongoid,chetan/mongoid,mysociety/mongoid,bearded/mongoid,grossws/mongoid,jeyb/mongoid,maxd/mongoid,ahoward/mongoid,hfwang/mongoid,luxerama/mongoid,tricknotes/mongoid,Speakol/mongoid,spiegela/mongoid,imomoisoft/mongoid,elia/mongoid,cmpolis/mongoid,Winslett/mongoid,jasl/mongoid,manuelmorales/mongoid,codedogfish/mongoid,charliehq/mongoid,zanker/mongoid,narutosanjiv/mongoid,Subskii/mongoid,matbox/mongoid,demarque/mongoid,crealytics/mongoid,manikandan-kandasamy/mongoid,janroesner/mongoid,ganlron/mongoid,subhashb/mongoid,joelcogen/mongoid,evansagge/mongoid,herimedia/mongoid,SumeruSoftware/mongoid,crealytics/mongoid,abezzub/mongoid,lowang/mongoid,bjori/mongoid,mattconnolly/mongoid,infiverve/mongoid,mongoid/mongoid,haihappen/mongoid,tzar/mongoid,tagliala/mongoid,fortnightlabs/mongoid,zenjoy/mongoid,nullstyle/mongoid,bencrouse/mongoid,aileron/mongoid,colinyoung/mongoid,jtescher/mongoid,SumeruSoftware/mongoid,manikandan-kandasamy/mongoid,kayakyakr/mongoid,hadees/mongoid,tolsen/mongoid,mysociety/mongoid,elia/mongoid,afeld/mongoid,hxx/mongoid,herimedia/mongoid,kostyantyn/mongoid,Spaceghost/mongoid,jonhyman/mongoid,kayakyakr/mongoid,hashrocketeer/mongoid,mschulkind/mongoid,robwil/mongoid,itbakery/mongoid,zaithottakath/mongoid,jordelver/mongoid,zBMNForks/mongoid,drobune/mongoid,arnkorty/mongoid,teaforthecat/mongoid,nagachika/mongoid,cmpolis/mongoid,mzsanford/mongoid,rosylilly/mongoid,irakli-janiashvili/mongoid,akirasosa/mongoid,stnguyen/mongoid,anuprit/mongoid,infiverve/mongoid,Welovroi/mongoid,jasl/mongoid,asaaki/mongoid,chetan/mongoid,neerfri/mongoid,joshsoftware/mongoid,estolfo/mongoid,ahoward/mongoid,matsimitsu/mongoid,dustinwatson/mongoid,slbug/mongoid,kcdragon/mongoid,moretea/mongoid,asaaki/mongoid,karmakaze/mongoid,incorvia/mongoid,franc/mongoid,Zhomart/mongoid,77Agency/mongoid,sideci-sample/sideci-sample-mongoid,johnny-miyake/mongoid,manuelmorales/mongoid,nusco/mongoid,dnd/mongoid,rosylilly/mongoid,hfwang/mongoid,joneslee85/mongoid,kay-kim/mongoid,maxd/mongoid,arnkorty/mongoid,rubrikkfabrikken/mongoid,kevinmarvin/mongoid,77Agency/mongoid,parov/mongoid,dustinwatson/mongoid,slbug/mongoid,brynary/mongoid,cpuguy83/mongoid,amw/mongoid,dannguyen/mongoid,lowang/mongoid,praecipula/mongoid,nusco/mongoid,johnnyshields/mongoid,demarque/mongoid,Exoth/mongoid,captain-lucas/mongoid,Subskii/mongoid,gregmolnar/mongoid,trmmy/mongoid,asantamar/mongoid,ganlron/mongoid,jonhyman/mongoid,nicolasblanco/mongoid,kuadrosx/mongoid,zenjoy/mongoid,dnd/mongoid,nagachika/mongoid,johnny-miyake/mongoid,stevebartholomew/mongoid,gregmolnar/mongoid,tolsen/mongoid,bigbenli/mongoid,mikerobe/mongoid,KoanHealth/mongoid,uniiverse/mongoid,PerfectMemory/mongoid,nullstyle/mongoid,uranazo/mongoid,joneslee85/mongoid,joelcogen/mongoid,kentaroi/mongoid,niedhui/mongoid,flexoid/mongoid,asantamar/mongoid,niedhui/mongoid,fredjean/mongoid,rubrikkfabrikken/mongoid,akirasosa/mongoid,shotoso/mongoid,bjori/mongoid,voldy/mongoid,matbox/mongoid,gicappa/mongoid,jstrocel/mongoid,zanker/mongoid,colinyoung/mongoid,wyattisimo/mongoid,mgartner/mongoid,cpuguy83/mongoid,narutosanjiv/mongoid,zaithottakath/mongoid,etomic/mongoid,Numerico/mongoid,PerfectMemory/mongoid,eljojo/mongoid,mash-ltd/mongoid,anuprit/mongoid,brynary/mongoid,wuboy0307/mongoid,mattconnolly/mongoid,teaforthecat/mongoid,socialreferral/mongoid,Numerico/mongoid,joshleitzel/mongoid,aleksclark/mongoid,jordoh/mongoid,razum2um/mongoid,Codas/mongoid,Speakol/mongoid,CIRCUITLLC/mongoid,rpocklin/mongoid,jstrocel/mongoid,luxerama/mongoid,Exoth/mongoid,mzsanford/mongoid,evansagge/mongoid,gicappa/mongoid,Azzurrio/mongoid,charliehq/mongoid,blackxored/mongoid,bearded/mongoid,moretea/mongoid,apptentive-engineering/mongoid,jbrien/mongoid,jbrien/mongoid,hbakhtiyor/mongoid,lackac/mongoid,lucasas/mongoid,kay-kim/mongoid,jamesalmond/mongoid,sepastian/mongoid,blackxored/mongoid,drobune/mongoid,jordoh/mongoid,gullitmiranda/mongoid,jamesalmond/mongoid,joshsoftware/mongoid,incorvia/mongoid,matsimitsu/mongoid,subhashb/mongoid,gullitmiranda/mongoid,captain-lucas/mongoid,karmakaze/mongoid,camallen/mongoid,icambron/mongoid,kslazarev/mongoid,kuadrosx/mongoid,mongodb/mongoid,stnguyen/mongoid,fortnightlabs/mongoid,tagliala/mongoid,wyattisimo/mongoid,Sharevari-Inc/mongoid,X0nic/mongoid,rogerz42892/mongoid,crowdtap/mongoid,mgartner/mongoid,sideci-sample/sideci-sample-mongoid,icambron/mongoid,imomoisoft/mongoid,zBMNForks/mongoid,haihappen/mongoid,crowdtap/mongoid,nviennot/mongoid,jeyb/mongoid,ElvinEfendi/mongoid,irakli-janiashvili/mongoid,joshleitzel/mongoid,Codas/mongoid,glebtv/mongoid,simi/mongoid,glebtv/mongoid,lucasas/mongoid,parov/mongoid,uranazo/mongoid,Welovroi/mongoid,goshakkk/mongoid,voldy/mongoid,bencrouse/mongoid,500px/mongoid,alexandru-calinoiu/mongoid,aileron/mongoid,mongoid/mongoid,stevebartholomew/mongoid,shotoso/mongoid,goshakkk/mongoid,KoanHealth/mongoid,Zhomart/mongoid,flexoid/mongoid,fbernier/mongoid,fredjean/mongoid,aj0strow/mongoid,Sharevari-Inc/mongoid,lawrencecurtis/mongoid,krasnoukhov/mongoid,cao7113/mongoid,timgluz/mongoid,bigbenli/mongoid,mash-ltd/mongoid,neerfri/mongoid,ErisExchange/mongoid,alexandru-calinoiu/mongoid