Include everything

Author: stephencelis

0127-parsing-performance-pt1/parser-performance.playground/Contents.swift

@@ -33,3 +33,22 @@ acuteE1.unicodeScalars.elementsEqual(acuteE2.unicodeScalars)
 "🇸"
 "🇺" + "🇸"
 "\u{1F1FA}\u{1F1F8}"
+
+
+
+"🇺🇸".dropFirst()
+
+String("🇺🇸".unicodeScalars.dropFirst())
+
+Array(acuteE1.utf8)
+Array(acuteE2.utf8)
+
+Array("🇺🇸".unicodeScalars)
+Array("🇺🇸".utf8)
+Array("👨‍👨‍👧‍👧".unicodeScalars)
+Array("👨‍👨‍👧‍👧".utf8)
+"👨‍👨‍👧‍👧".utf8.count
+
+"🇺🇸".unicodeScalars.first == ("🇺" as Unicode.Scalar)
+
+"🇺🇸".utf8.starts(with: [240, 159, 135, 186])

0127-parsing-performance-pt1/string-performance/Sources/string-performance/Benchmark-Copying.swift

@@ -1,7 +1,7 @@
 import Benchmark
 
 let copyingSuite = BenchmarkSuite(name: "Copying") { suite in
-  let string = String.init(repeating: "A", count: 1_000_000)
+  let string = String.init(repeating: "👨‍👨‍👧‍👧", count: 1_000_000)
 
   suite.benchmark("String") {
     var copy = string
@@ -24,5 +24,27 @@ let copyingSuite = BenchmarkSuite(name: "Copying") { suite in
     var copy3 = copy2
     copy3.removeFirst()
   }
+
+  suite.benchmark("UnicodeScalars") {
+    var copy = string[...].unicodeScalars
+    copy.removeFirst()
+    var copy1 = copy
+    copy1.removeFirst()
+    var copy2 = copy1
+    copy2.removeFirst()
+    var copy3 = copy2
+    copy3.removeFirst()
+  }
+
+  suite.benchmark("UTF8") {
+    var copy = string[...].utf8
+    copy.removeFirst()
+    var copy1 = copy
+    copy1.removeFirst()
+    var copy2 = copy1
+    copy2.removeFirst()
+    var copy3 = copy2
+    copy3.removeFirst()
+  }
 }