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Add benchmarks for lengthOfBytes(using:) and maximumLengthOfBytes(using:) #82248

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Add benchmarks for lengthOfBytes(using:) and maximumLengthOfBytes(usi…
Catfish-Man Jun 13, 2025
2454fdc
Build fix
Catfish-Man Jun 14, 2025
8372157
Build fix
Catfish-Man Jun 14, 2025
58c89ee
Reduce iterations
Catfish-Man Jun 14, 2025
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128 changes: 126 additions & 2 deletions benchmark/single-source/ObjectiveCBridging.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,42 @@ public let benchmarks = [
BenchmarkInfo(name: "NSDictionary.bridged.enumerate",
runFunction: run_BridgedNSDictionaryEnumerate, tags: t,
setUpFunction: setup_bridgedDictionaries),
BenchmarkInfo(name: "NSString.bridged.byteCount.ascii.ascii",
runFunction: run_BridgedNSStringLengthASCII_ASCII, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.byteCount.ascii.utf8",
runFunction: run_BridgedNSStringLengthASCII_UTF8, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.byteCount.ascii.utf16",
runFunction: run_BridgedNSStringLengthASCII_UTF16, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.byteCount.ascii.macroman",
runFunction: run_BridgedNSStringLengthASCII_MacRoman, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.byteCount.utf8.utf8",
runFunction: run_BridgedNSStringLengthUTF8_UTF8, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.byteCount.utf8.utf16",
runFunction: run_BridgedNSStringLengthUTF8_UTF16, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.maxByteCount.ascii.ascii",
runFunction: run_BridgedNSStringMaxLengthASCII_ASCII, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.maxByteCount.ascii.utf8",
runFunction: run_BridgedNSStringMaxLengthASCII_UTF8, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.maxByteCount.ascii.utf16",
runFunction: run_BridgedNSStringMaxLengthASCII_UTF16, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.maxByteCount.ascii.macroman",
runFunction: run_BridgedNSStringMaxLengthASCII_MacRoman, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.maxByteCount.utf8.utf8",
runFunction: run_BridgedNSStringMaxLengthUTF8_UTF8, tags: ts,
setUpFunction: setup_bridgedStrings),
BenchmarkInfo(name: "NSString.bridged.maxByteCount.utf8.utf16",
runFunction: run_BridgedNSStringMaxLengthUTF8_UTF16, tags: ts,
setUpFunction: setup_bridgedStrings),
]

#if _runtime(_ObjC)
Expand Down Expand Up @@ -801,6 +837,8 @@ var bridgedDictionaryOfNumbersToNumbers:NSDictionary! = nil
var bridgedArrayMutableCopy:NSMutableArray! = nil
var nsArray:NSArray! = nil
var nsArrayMutableCopy:NSMutableArray! = nil
var bridgedASCIIString:NSString! = nil
var bridgedUTF8String:NSString! = nil
#endif

public func setup_bridgedArrays() {
Expand All @@ -822,6 +860,14 @@ public func setup_bridgedDictionaries() {
bridgedDictionaryOfNumbersToNumbers = numDict as NSDictionary
}

public func setup_bridgedStrings() {
#if _runtime(_ObjC)
let str = Array(repeating: "The quick brown fox jumps over the lazy dog.", count: 100).joined()
bridgedASCIIString = str as NSString
let str2 = Array(repeating: "The quick brown fox jumps over the lazy dög.", count: 100).joined()
bridgedUTF8String = str2 as NSString
#endif
}

@inline(never)
public func run_BridgedNSArrayObjectAtIndex(_ n: Int) {
Expand Down Expand Up @@ -855,7 +901,7 @@ public func run_BridgedNSDictionaryEnumerate(_ n: Int) {
public func run_BridgedNSArrayBufferAccess(_ n: Int) {
#if _runtime(_ObjC)
for _ in 0 ..< n {
for i in 0..<1000 {
for _ in 0..<1000 {
let tmp = nsArray as! [NSObject]
blackHole(tmp)
blackHole(tmp.withContiguousStorageIfAvailable {
Expand All @@ -872,7 +918,7 @@ public func run_BridgedNSArrayRepeatedBufferAccess(_ n: Int) {
for _ in 0 ..< n {
let tmp = nsArray as! [NSObject]
blackHole(tmp)
for i in 0..<1000 {
for _ in 0..<1000 {
blackHole(tmp.withContiguousStorageIfAvailable {
$0[0]
})
Expand Down Expand Up @@ -914,3 +960,81 @@ public func run_RealNSArrayMutableCopyObjectAtIndex(_ n: Int) {
#endif
}

@inline(__always)
fileprivate func run_BridgedNSStringLength(_ asciiBase: Bool, _ enc: UInt, _ n: Int) {
let str = asciiBase ? bridgedASCIIString : bridgedUTF8String
for _ in 0 ..< n * 100 {
blackHole(str!.lengthOfBytes(using: enc))
}
}

@inline(never)
public func run_BridgedNSStringLengthASCII_ASCII(_ n: Int) {
run_BridgedNSStringLength(true, 1 /* NSASCIIStringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringLengthASCII_UTF8(_ n: Int) {
run_BridgedNSStringLength(true, 4 /* NSUTF8StringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringLengthASCII_UTF16(_ n: Int) {
run_BridgedNSStringLength(true, 10 /* NSUnicodeStringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringLengthASCII_MacRoman(_ n: Int) {
run_BridgedNSStringLength(true, 30 /* NSMacOSRomanStringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringLengthUTF8_UTF8(_ n: Int) {
run_BridgedNSStringLength(false, 4 /* NSUTF8StringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringLengthUTF8_UTF16(_ n: Int) {
run_BridgedNSStringLength(false, 10 /* NSUnicodeStringEncoding */, n)
}

@inline(__always)
fileprivate func run_BridgedNSStringMaxLength(_ asciiBase: Bool, _ enc: UInt, _ n: Int) {
let str = asciiBase ? bridgedASCIIString! : bridgedUTF8String!
for _ in 0 ..< n * 100 {
for i in 0..<100 {
blackHole(str.maximumLengthOfBytes(using: enc))
}
}
}

@inline(never)
public func run_BridgedNSStringMaxLengthASCII_ASCII(_ n: Int) {
run_BridgedNSStringMaxLength(true, 1 /* NSASCIIStringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringMaxLengthASCII_UTF8(_ n: Int) {
run_BridgedNSStringMaxLength(true, 4 /* NSUTF8StringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringMaxLengthASCII_UTF16(_ n: Int) {
run_BridgedNSStringMaxLength(true, 10 /* NSUnicodeStringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringMaxLengthASCII_MacRoman(_ n: Int) {
run_BridgedNSStringMaxLength(true, 30 /* NSMacOSRomanStringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringMaxLengthUTF8_UTF8(_ n: Int) {
run_BridgedNSStringMaxLength(false, 4 /* NSUTF8StringEncoding */, n)
}

@inline(never)
public func run_BridgedNSStringMaxLengthUTF8_UTF16(_ n: Int) {
run_BridgedNSStringMaxLength(false, 10 /* NSUnicodeStringEncoding */, n)
}