[benchmark] Refactor to currency type Int
[benchmark] Refactor to currency type Int

Removed unnecessary use of UInt64, where appropriate, following the advice from Swift Language Guide:

> Use the `Int` type for all general-purpose integer constants and variables in your code, even if they’re known to be nonnegative. Using the default integer type in everyday situations means that integer constants and variables are immediately interoperable in your code and will match the inferred type for integer literal values.
https://docs.swift.org/swift-book/LanguageGuide/TheBasics.html#ID324

jckarter/swift,jckarter/swift,allevato/swift,benlangmuir/swift,aschwaighofer/swift,danielmartin/swift,practicalswift/swift,rudkx/swift,jckarter/swift,stephentyrone/swift,allevato/swift,JGiola/swift,parkera/swift,atrick/swift,practicalswift/swift,airspeedswift/swift,gribozavr/swift,allevato/swift,harlanhaskins/swift,shajrawi/swift,roambotics/swift,devincoughlin/swift,hooman/swift,lorentey/swift,apple/swift,hooman/swift,sschiau/swift,hooman/swift,jmgc/swift,ahoppen/swift,benlangmuir/swift,benlangmuir/swift,apple/swift,jckarter/swift,danielmartin/swift,aschwaighofer/swift,xedin/swift,gribozavr/swift,nathawes/swift,gribozavr/swift,austinzheng/swift,rudkx/swift,amraboelela/swift,nathawes/swift,harlanhaskins/swift,jmgc/swift,amraboelela/swift,devincoughlin/swift,tkremenek/swift,practicalswift/swift,shajrawi/swift,shahmishal/swift,nathawes/swift,sschiau/swift,parkera/swift,brentdax/swift,JGiola/swift,brentdax/swift,practicalswift/swift,shajrawi/swift,rudkx/swift,xedin/swift,JGiola/swift,xwu/swift,roambotics/swift,lorentey/swift,sschiau/swift,atrick/swift,devincoughlin/swift,stephentyrone/swift,nathawes/swift,atrick/swift,ahoppen/swift,sschiau/swift,rudkx/swift,tkremenek/swift,austinzheng/swift,xwu/swift,shahmishal/swift,shajrawi/swift,stephentyrone/swift,shajrawi/swift,gribozavr/swift,shahmishal/swift,nathawes/swift,lorentey/swift,harlanhaskins/swift,practicalswift/swift,austinzheng/swift,brentdax/swift,xwu/swift,gregomni/swift,tkremenek/swift,nathawes/swift,austinzheng/swift,stephentyrone/swift,stephentyrone/swift,JGiola/swift,parkera/swift,aschwaighofer/swift,roambotics/swift,xedin/swift,xwu/swift,CodaFi/swift,shahmishal/swift,hooman/swift,jmgc/swift,alblue/swift,devincoughlin/swift,austinzheng/swift,gribozavr/swift,alblue/swift,CodaFi/swift,karwa/swift,gregomni/swift,jckarter/swift,glessard/swift,glessard/swift,atrick/swift,gregomni/swift,airspeedswift/swift,shahmishal/swift,brentdax/swift,airspeedswift/swift,allevato/swift,sschiau/swift,lorentey/swift,karwa/swift,apple/swift,lorentey/swift,xedin/swift,gribozavr/swift,karwa/swift,tkremenek/swift,aschwaighofer/swift,ahoppen/swift,xedin/swift,CodaFi/swift,tkremenek/swift,hooman/swift,benlangmuir/swift,atrick/swift,brentdax/swift,airspeedswift/swift,apple/swift,JGiola/swift,lorentey/swift,gribozavr/swift,parkera/swift,glessard/swift,alblue/swift,jmgc/swift,benlangmuir/swift,danielmartin/swift,gribozavr/swift,alblue/swift,allevato/swift,danielmartin/swift,CodaFi/swift,rudkx/swift,amraboelela/swift,roambotics/swift,airspeedswift/swift,devincoughlin/swift,xwu/swift,apple/swift,alblue/swift,alblue/swift,JGiola/swift,karwa/swift,amraboelela/swift,CodaFi/swift,gregomni/swift,shahmishal/swift,harlanhaskins/swift,devincoughlin/swift,lorentey/swift,airspeedswift/swift,amraboelela/swift,stephentyrone/swift,xedin/swift,amraboelela/swift,sschiau/swift,jmgc/swift,glessard/swift,jmgc/swift,parkera/swift,alblue/swift,nathawes/swift,parkera/swift,aschwaighofer/swift,hooman/swift,sschiau/swift,shajrawi/swift,danielmartin/swift,parkera/swift,roambotics/swift,roambotics/swift,xedin/swift,karwa/swift,shajrawi/swift,devincoughlin/swift,hooman/swift,rudkx/swift,karwa/swift,xedin/swift,shajrawi/swift,aschwaighofer/swift,karwa/swift,tkremenek/swift,stephentyrone/swift,karwa/swift,brentdax/swift,lorentey/swift,brentdax/swift,parkera/swift,gregomni/swift,danielmartin/swift,benlangmuir/swift,ahoppen/swift,gregomni/swift,austinzheng/swift,sschiau/swift,apple/swift,xwu/swift,jmgc/swift,jckarter/swift,shahmishal/swift,practicalswift/swift,glessard/swift,allevato/swift,xwu/swift,jckarter/swift,devincoughlin/swift,airspeedswift/swift,ahoppen/swift,ahoppen/swift,shahmishal/swift,allevato/swift,aschwaighofer/swift,CodaFi/swift,practicalswift/swift,harlanhaskins/swift,austinzheng/swift,CodaFi/swift,tkremenek/swift,harlanhaskins/swift,danielmartin/swift,atrick/swift,amraboelela/swift,practicalswift/swift,glessard/swift,harlanhaskins/swift