Small performance improvement
Small performance improvement

node.selection() is not used text_content is equal to 
TextContent::GeneratedContent(content_items)
rnestler/servo,emilio/servo,peterjoel/servo,rnestler/servo,splav/servo,rnestler/servo,upsuper/servo,ConnorGBrewster/servo,mbrubeck/servo,thiagopnts/servo,paulrouget/servo,dsandeephegde/servo,anthgur/servo,nnethercote/servo,dati91/servo,splav/servo,KiChjang/servo,nnethercote/servo,paulrouget/servo,szeged/servo,DominoTree/servo,peterjoel/servo,sadmansk/servo,notriddle/servo,KiChjang/servo,canaltinova/servo,eddyb/servo,avadacatavra/servo,avadacatavra/servo,SimonSapin/servo,dsandeephegde/servo,cbrewster/servo,dati91/servo,rnestler/servo,notriddle/servo,emilio/servo,notriddle/servo,CJ8664/servo,canaltinova/servo,KiChjang/servo,upsuper/servo,mattnenterprise/servo,canaltinova/servo,eddyb/servo,CJ8664/servo,sadmansk/servo,paulrouget/servo,eddyb/servo,splav/servo,avadacatavra/servo,cbrewster/servo,pyfisch/servo,jimberlage/servo,mattnenterprise/servo,paulrouget/servo,thiagopnts/servo,pyfisch/servo,dsandeephegde/servo,peterjoel/servo,nnethercote/servo,saneyuki/servo,mbrubeck/servo,mattnenterprise/servo,fiji-flo/servo,SimonSapin/servo,dati91/servo,avadacatavra/servo,upsuper/servo,rnestler/servo,ConnorGBrewster/servo,splav/servo,paulrouget/servo,larsbergstrom/servo,dsandeephegde/servo,SimonSapin/servo,notriddle/servo,anthgur/servo,dati91/servo,jimberlage/servo,DominoTree/servo,thiagopnts/servo,mattnenterprise/servo,dati91/servo,larsbergstrom/servo,CJ8664/servo,KiChjang/servo,peterjoel/servo,emilio/servo,fiji-flo/servo,sadmansk/servo,sadmansk/servo,splav/servo,saneyuki/servo,nnethercote/servo,saneyuki/servo,fiji-flo/servo,larsbergstrom/servo,larsbergstrom/servo,szeged/servo,thiagopnts/servo,mattnenterprise/servo,avadacatavra/servo,emilio/servo,CJ8664/servo,paulrouget/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,pyfisch/servo,peterjoel/servo,nnethercote/servo,jimberlage/servo,cbrewster/servo,SimonSapin/servo,peterjoel/servo,nrc/servo,anthgur/servo,splav/servo,sadmansk/servo,ConnorGBrewster/servo,dsandeephegde/servo,anthgur/servo,fiji-flo/servo,mattnenterprise/servo,dati91/servo,emilio/servo,rnestler/servo,KiChjang/servo,notriddle/servo,avadacatavra/servo,paulrouget/servo,canaltinova/servo,saneyuki/servo,SimonSapin/servo,avadacatavra/servo,ConnorGBrewster/servo,szeged/servo,pyfisch/servo,dsandeephegde/servo,upsuper/servo,mattnenterprise/servo,sadmansk/servo,DominoTree/servo,DominoTree/servo,pyfisch/servo,DominoTree/servo,mbrubeck/servo,emilio/servo,anthgur/servo,larsbergstrom/servo,jimberlage/servo,eddyb/servo,SimonSapin/servo,nnethercote/servo,thiagopnts/servo,CJ8664/servo,saneyuki/servo,jimberlage/servo,notriddle/servo,szeged/servo,upsuper/servo,splav/servo,szeged/servo,jimberlage/servo,nnethercote/servo,KiChjang/servo,notriddle/servo,szeged/servo,CJ8664/servo,upsuper/servo,eddyb/servo,SimonSapin/servo,cbrewster/servo,sadmansk/servo,DominoTree/servo,dati91/servo,emilio/servo,DominoTree/servo,fiji-flo/servo,canaltinova/servo,upsuper/servo,canaltinova/servo,mattnenterprise/servo,paulrouget/servo,saneyuki/servo,eddyb/servo,cbrewster/servo,paulrouget/servo,saneyuki/servo,szeged/servo,dsandeephegde/servo,DominoTree/servo,szeged/servo,CJ8664/servo,mbrubeck/servo,szeged/servo,larsbergstrom/servo,pyfisch/servo,KiChjang/servo,ConnorGBrewster/servo,KiChjang/servo,jimberlage/servo,mbrubeck/servo,DominoTree/servo,nrc/servo,cbrewster/servo,emilio/servo,ConnorGBrewster/servo,splav/servo,peterjoel/servo,CJ8664/servo,canaltinova/servo,rnestler/servo,anthgur/servo,saneyuki/servo,nrc/servo,DominoTree/servo,nrc/servo,peterjoel/servo,pyfisch/servo,dsandeephegde/servo,notriddle/servo,splav/servo,fiji-flo/servo,pyfisch/servo,thiagopnts/servo,cbrewster/servo,splav/servo,mbrubeck/servo,paulrouget/servo,cbrewster/servo,thiagopnts/servo,jimberlage/servo,nrc/servo,larsbergstrom/servo,anthgur/servo,peterjoel/servo,eddyb/servo,avadacatavra/servo,nnethercote/servo,nrc/servo,larsbergstrom/servo,SimonSapin/servo,mbrubeck/servo,nnethercote/servo,notriddle/servo,fiji-flo/servo,pyfisch/servo,canaltinova/servo,dati91/servo,fiji-flo/servo,thiagopnts/servo,larsbergstrom/servo,nrc/servo,sadmansk/servo,eddyb/servo,notriddle/servo,saneyuki/servo,mbrubeck/servo,larsbergstrom/servo,nnethercote/servo,KiChjang/servo,peterjoel/servo,anthgur/servo,emilio/servo,szeged/servo,upsuper/servo,saneyuki/servo,emilio/servo,jimberlage/servo,rnestler/servo,pyfisch/servo,KiChjang/servo