Created
June 9, 2017 21:20
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UInt64 vs String Access Times
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import Foundation | |
func benchmark(_ function: () -> ()) -> Double { | |
let start = DispatchTime.now() | |
function() | |
let elapsed = Double(DispatchTime.now().uptimeNanoseconds - start.uptimeNanoseconds) / 1_000_000_000 | |
return elapsed | |
} | |
let count = 10_000_000 | |
var intDic = [UInt64: UInt32]() | |
var stringIntDic = [UInt64: UInt32]() | |
var stringDic = [String: UInt32]() | |
print("Generating Ints") | |
let ints = (0..<count).map { _ in UInt64(arc4random()) << 32 | UInt64(arc4random()) } | |
print("Generating Strings") | |
let strings = ints.map(String.init) | |
print("Generating Output") | |
let randomOut = (0..<count).map { _ in arc4random() } | |
print("Benchmarking") | |
let intFill = benchmark { | |
for i in 0..<count { | |
intDic[ints[i]] = randomOut[i] | |
} | |
} | |
print("Int Fill: \(intFill)") | |
let stringIntFill = benchmark { | |
for i in 0..<count { | |
stringIntDic[UInt64(strings[i])!] = randomOut[i] | |
} | |
} | |
print("String -> Int Fill: \(stringIntFill)") | |
let stringFill = benchmark { | |
for i in 0..<count { | |
stringDic[strings[i]] = randomOut[i] | |
} | |
} | |
print("String Fill: \(stringFill)") | |
let intRead = benchmark { | |
for i in 0..<count { | |
_ = intDic[ints[i]] | |
} | |
} | |
print("Int Read: \(intRead)") | |
let stringIntRead = benchmark { | |
for i in 0..<count { | |
_ = stringIntDic[UInt64(strings[i])!] | |
} | |
} | |
print("String -> Int Read: \(stringIntRead)") | |
let stringRead = benchmark { | |
for i in 0..<count { | |
_ = stringDic[strings[i]] | |
} | |
} | |
print("String Read: \(stringRead)") | |
let intClear = benchmark { | |
for i in 0..<count { | |
intDic[ints[i]] = nil | |
} | |
} | |
print("Int Delete: \(intClear)") | |
let stringIntClear = benchmark { | |
for i in 0..<count { | |
stringIntDic[UInt64(strings[i])!] = nil | |
} | |
} | |
print("String -> Int Delete: \(stringIntClear)") | |
let stringClear = benchmark { | |
for i in 0..<count { | |
stringDic[strings[i]] = nil | |
} | |
} | |
print("String Delete: \(stringClear)") |
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import Foundation | |
let count = 10_000_000 | |
let wait: UInt32 = 10_000_000 | |
print("Generating Ints") | |
var ints = (0..<count).map { _ in UInt64(arc4random()) << 32 | UInt64(arc4random()) } | |
print("Done") | |
usleep(wait) | |
print("Generating Strings") | |
var strings = ints.map(String.init) | |
print("Done") | |
usleep(wait) | |
print("Deleting Ints") | |
ints = [] | |
print("Done") | |
usleep(wait) | |
print("Deleting Strings") | |
strings = [] | |
print("Done") | |
usleep(wait) |
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