Add performance FIXME for Set.intersect
Add performance FIXME for Set.intersect

Swift SVN r23675

manavgabhawala/swift,allevato/swift,SwiftAndroid/swift,JaSpa/swift,shajrawi/swift,jtbandes/swift,OscarSwanros/swift,LeoShimonaka/swift,brentdax/swift,manavgabhawala/swift,modocache/swift,huonw/swift,tardieu/swift,gmilos/swift,stephentyrone/swift,JaSpa/swift,manavgabhawala/swift,hughbe/swift,tkremenek/swift,danielmartin/swift,gottesmm/swift,CodaFi/swift,mightydeveloper/swift,deyton/swift,adrfer/swift,huonw/swift,kperryua/swift,jtbandes/swift,tardieu/swift,danielmartin/swift,bitjammer/swift,LeoShimonaka/swift,KrishMunot/swift,therealbnut/swift,glessard/swift,CodaFi/swift,Jnosh/swift,kentya6/swift,xwu/swift,nathawes/swift,ken0nek/swift,Ivacker/swift,modocache/swift,milseman/swift,gottesmm/swift,dduan/swift,stephentyrone/swift,jtbandes/swift,therealbnut/swift,parkera/swift,Jnosh/swift,IngmarStein/swift,shajrawi/swift,sschiau/swift,kstaring/swift,gottesmm/swift,hooman/swift,KrishMunot/swift,djwbrown/swift,kentya6/swift,gribozavr/swift,arvedviehweger/swift,JaSpa/swift,parkera/swift,emilstahl/swift,modocache/swift,russbishop/swift,karwa/swift,alblue/swift,dduan/swift,felix91gr/swift,sschiau/swift,LeoShimonaka/swift,tardieu/swift,IngmarStein/swift,felix91gr/swift,devincoughlin/swift,allevato/swift,kusl/swift,CodaFi/swift,roambotics/swift,hughbe/swift,lorentey/swift,felix91gr/swift,LeoShimonaka/swift,atrick/swift,calebd/swift,emilstahl/swift,ahoppen/swift,ken0nek/swift,jmgc/swift,gribozavr/swift,harlanhaskins/swift,shahmishal/swift,gottesmm/swift,amraboelela/swift,natecook1000/swift,kentya6/swift,calebd/swift,natecook1000/swift,ahoppen/swift,kentya6/swift,SwiftAndroid/swift,danielmartin/swift,rudkx/swift,modocache/swift,benlangmuir/swift,MukeshKumarS/Swift,kstaring/swift,cbrentharris/swift,brentdax/swift,tinysun212/swift-windows,nathawes/swift,stephentyrone/swift,kperryua/swift,swiftix/swift.old,kentya6/swift,xwu/swift,CodaFi/swift,tkremenek/swift,jmgc/swift,calebd/swift,tkremenek/swift,danielmartin/swift,xwu/swift,swiftix/swift.old,karwa/swift,ken0nek/swift,calebd/swift,zisko/swift,austinzheng/swift,amraboelela/swift,tinysun212/swift-windows,sschiau/swift,MukeshKumarS/Swift,sdulal/swift,bitjammer/swift,return/swift,zisko/swift,brentdax/swift,glessard/swift,uasys/swift,hooman/swift,xedin/swift,slavapestov/swift,arvedviehweger/swift,IngmarStein/swift,Jnosh/swift,zisko/swift,benlangmuir/swift,natecook1000/swift,kperryua/swift,Ivacker/swift,uasys/swift,frootloops/swift,dreamsxin/swift,OscarSwanros/swift,khizkhiz/swift,khizkhiz/swift,cbrentharris/swift,swiftix/swift.old,JaSpa/swift,slavapestov/swift,tjw/swift,slavapestov/swift,mightydeveloper/swift,danielmartin/swift,kusl/swift,djwbrown/swift,practicalswift/swift,MukeshKumarS/Swift,lorentey/swift,tkremenek/swift,JaSpa/swift,zisko/swift,OscarSwanros/swift,sdulal/swift,jopamer/swift,deyton/swift,glessard/swift,codestergit/swift,hughbe/swift,mightydeveloper/swift,brentdax/swift,swiftix/swift,stephentyrone/swift,shahmishal/swift,johnno1962d/swift,milseman/swift,jopamer/swift,dduan/swift,tjw/swift,khizkhiz/swift,swiftix/swift,dduan/swift,JGiola/swift,CodaFi/swift,shajrawi/swift,milseman/swift,huonw/swift,modocache/swift,bitjammer/swift,natecook1000/swift,practicalswift/swift,austinzheng/swift,ken0nek/swift,lorentey/swift,zisko/swift,MukeshKumarS/Swift,SwiftAndroid/swift,jckarter/swift,sdulal/swift,tkremenek/swift,therealbnut/swift,nathawes/swift,gottesmm/swift,shahmishal/swift,gmilos/swift,calebd/swift,kusl/swift,sdulal/swift,OscarSwanros/swift,swiftix/swift.old,apple/swift,harlanhaskins/swift,nathawes/swift,apple/swift,sschiau/swift,return/swift,MukeshKumarS/Swift,kusl/swift,frootloops/swift,jckarter/swift,tkremenek/swift,airspeedswift/swift,hughbe/swift,gmilos/swift,KrishMunot/swift,ahoppen/swift,tinysun212/swift-windows,kusl/swift,gribozavr/swift,bitjammer/swift,johnno1962d/swift,johnno1962d/swift,allevato/swift,Ivacker/swift,atrick/swift,khizkhiz/swift,roambotics/swift,milseman/swift,LeoShimonaka/swift,tjw/swift,atrick/swift,hooman/swift,jopamer/swift,natecook1000/swift,xedin/swift,brentdax/swift,kstaring/swift,shajrawi/swift,swiftix/swift,emilstahl/swift,allevato/swift,hooman/swift,swiftix/swift,jckarter/swift,swiftix/swift.old,harlanhaskins/swift,arvedviehweger/swift,jmgc/swift,uasys/swift,tjw/swift,dduan/swift,natecook1000/swift,atrick/swift,therealbnut/swift,codestergit/swift,allevato/swift,devincoughlin/swift,parkera/swift,harlanhaskins/swift,Jnosh/swift,stephentyrone/swift,dreamsxin/swift,austinzheng/swift,aschwaighofer/swift,kstaring/swift,khizkhiz/swift,emilstahl/swift,adrfer/swift,manavgabhawala/swift,swiftix/swift,IngmarStein/swift,gmilos/swift,rudkx/swift,IngmarStein/swift,xedin/swift,OscarSwanros/swift,swiftix/swift.old,gregomni/swift,djwbrown/swift,jopamer/swift,xedin/swift,amraboelela/swift,sschiau/swift,dduan/swift,arvedviehweger/swift,parkera/swift,jtbandes/swift,alblue/swift,deyton/swift,tardieu/swift,JGiola/swift,sschiau/swift,amraboelela/swift,felix91gr/swift,hooman/swift,devincoughlin/swift,ben-ng/swift,calebd/swift,slavapestov/swift,djwbrown/swift,Ivacker/swift,zisko/swift,kstaring/swift,russbishop/swift,alblue/swift,natecook1000/swift,OscarSwanros/swift,tinysun212/swift-windows,mightydeveloper/swift,adrfer/swift,JGiola/swift,bitjammer/swift,parkera/swift,practicalswift/swift,xwu/swift,deyton/swift,xwu/swift,devincoughlin/swift,kentya6/swift,shahmishal/swift,Jnosh/swift,harlanhaskins/swift,apple/swift,shajrawi/swift,jckarter/swift,cbrentharris/swift,zisko/swift,swiftix/swift.old,airspeedswift/swift,apple/swift,amraboelela/swift,gmilos/swift,hughbe/swift,rudkx/swift,djwbrown/swift,slavapestov/swift,SwiftAndroid/swift,Ivacker/swift,rudkx/swift,austinzheng/swift,roambotics/swift,nathawes/swift,JGiola/swift,return/swift,hooman/swift,gregomni/swift,return/swift,karwa/swift,lorentey/swift,tardieu/swift,tinysun212/swift-windows,huonw/swift,shahmishal/swift,gregomni/swift,tinysun212/swift-windows,russbishop/swift,therealbnut/swift,huonw/swift,JGiola/swift,danielmartin/swift,aschwaighofer/swift,alblue/swift,ben-ng/swift,kusl/swift,modocache/swift,Ivacker/swift,johnno1962d/swift,harlanhaskins/swift,airspeedswift/swift,amraboelela/swift,glessard/swift,IngmarStein/swift,shajrawi/swift,parkera/swift,tjw/swift,xedin/swift,xedin/swift,tardieu/swift,deyton/swift,deyton/swift,airspeedswift/swift,felix91gr/swift,shajrawi/swift,Ivacker/swift,mightydeveloper/swift,SwiftAndroid/swift,KrishMunot/swift,emilstahl/swift,kstaring/swift,austinzheng/swift,gmilos/swift,kentya6/swift,slavapestov/swift,practicalswift/swift,devincoughlin/swift,austinzheng/swift,sdulal/swift,alblue/swift,hooman/swift,jopamer/swift,arvedviehweger/swift,benlangmuir/swift,adrfer/swift,russbishop/swift,aschwaighofer/swift,adrfer/swift,tjw/swift,manavgabhawala/swift,practicalswift/swift,ben-ng/swift,gottesmm/swift,arvedviehweger/swift,russbishop/swift,calebd/swift,tinysun212/swift-windows,gottesmm/swift,kperryua/swift,frootloops/swift,mightydeveloper/swift,sdulal/swift,sdulal/swift,cbrentharris/swift,stephentyrone/swift,emilstahl/swift,aschwaighofer/swift,kusl/swift,aschwaighofer/swift,gmilos/swift,shajrawi/swift,benlangmuir/swift,mightydeveloper/swift,uasys/swift,aschwaighofer/swift,nathawes/swift,jckarter/swift,OscarSwanros/swift,milseman/swift,tkremenek/swift,adrfer/swift,slavapestov/swift,khizkhiz/swift,karwa/swift,lorentey/swift,uasys/swift,modocache/swift,sdulal/swift,manavgabhawala/swift,ahoppen/swift,russbishop/swift,kperryua/swift,jckarter/swift,JGiola/swift,jmgc/swift,harlanhaskins/swift,return/swift,gribozavr/swift,brentdax/swift,brentdax/swift,uasys/swift,amraboelela/swift,devincoughlin/swift,hughbe/swift,codestergit/swift,gribozavr/swift,karwa/swift,ken0nek/swift,milseman/swift,rudkx/swift,karwa/swift,ahoppen/swift,jopamer/swift,jopamer/swift,gregomni/swift,apple/swift,codestergit/swift,jckarter/swift,IngmarStein/swift,codestergit/swift,allevato/swift,adrfer/swift,milseman/swift,xwu/swift,ben-ng/swift,tjw/swift,glessard/swift,ben-ng/swift,rudkx/swift,kperryua/swift,SwiftAndroid/swift,frootloops/swift,sschiau/swift,gregomni/swift,benlangmuir/swift,swiftix/swift,nathawes/swift,ken0nek/swift,cbrentharris/swift,roambotics/swift,JaSpa/swift,kstaring/swift,atrick/swift,cbrentharris/swift,djwbrown/swift,arvedviehweger/swift,MukeshKumarS/Swift,lorentey/swift,jtbandes/swift,huonw/swift,emilstahl/swift,stephentyrone/swift,allevato/swift,gribozavr/swift,swiftix/swift,KrishMunot/swift,kperryua/swift,kentya6/swift,CodaFi/swift,airspeedswift/swift,ben-ng/swift,glessard/swift,shahmishal/swift,emilstahl/swift,devincoughlin/swift,felix91gr/swift,johnno1962d/swift,cbrentharris/swift,karwa/swift,felix91gr/swift,johnno1962d/swift,LeoShimonaka/swift,jmgc/swift,KrishMunot/swift,xwu/swift,return/swift,MukeshKumarS/Swift,ahoppen/swift,shahmishal/swift,jtbandes/swift,manavgabhawala/swift,tardieu/swift,roambotics/swift,huonw/swift,Jnosh/swift,benlangmuir/swift,shahmishal/swift,frootloops/swift,parkera/swift,apple/swift,jmgc/swift,practicalswift/swift,gregomni/swift,khizkhiz/swift,jtbandes/swift,SwiftAndroid/swift,xedin/swift,danielmartin/swift,return/swift,swiftix/swift.old,KrishMunot/swift,alblue/swift,bitjammer/swift,codestergit/swift,practicalswift/swift,uasys/swift,parkera/swift,jmgc/swift,dduan/swift,therealbnut/swift,kusl/swift,mightydeveloper/swift,Jnosh/swift,lorentey/swift,LeoShimonaka/swift,russbishop/swift,roambotics/swift,cbrentharris/swift,therealbnut/swift,ken0nek/swift,bitjammer/swift,hughbe/swift,johnno1962d/swift,frootloops/swift,lorentey/swift,atrick/swift,CodaFi/swift,Ivacker/swift,airspeedswift/swift,ben-ng/swift,sschiau/swift,LeoShimonaka/swift,alblue/swift,airspeedswift/swift,karwa/swift,practicalswift/swift,aschwaighofer/swift,austinzheng/swift,JaSpa/swift,gribozavr/swift,gribozavr/swift,frootloops/swift,xedin/swift,deyton/swift,devincoughlin/swift,codestergit/swift,djwbrown/swift