Performance improvements

janos · Jan 7, 2024 · f90257e · f90257e
1 parent d71ce36
commit f90257e
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diff --git a/README.md b/README.md
@@ -35,26 +35,26 @@ goos: darwin
 goarch: arm64
 pkg: resenje.org/casbab
 BenchmarkCamel
-BenchmarkCamel-10               1826664        642.2 ns/op      640 B/op        9 allocs/op
+BenchmarkCamel-10               2106188        569.1 ns/op      640 B/op        9 allocs/op
 BenchmarkPascal
-BenchmarkPascal-10              1830391        638.6 ns/op      640 B/op        9 allocs/op
+BenchmarkPascal-10              2123118        567.5 ns/op      640 B/op        9 allocs/op
 BenchmarkSnake
-BenchmarkSnake-10               1868508        653.8 ns/op      640 B/op        9 allocs/op
+BenchmarkSnake-10               2091612        567.1 ns/op      640 B/op        9 allocs/op
 BenchmarkCamelSnake
-BenchmarkCamelSnake-10          1782997        685.2 ns/op      640 B/op        9 allocs/op
+BenchmarkCamelSnake-10          2032400        586.8 ns/op      640 B/op        9 allocs/op
 BenchmarkScreamingSnake
-BenchmarkScreamingSnake-10      1583528        740.1 ns/op      640 B/op        9 allocs/op
+BenchmarkScreamingSnake-10      1753968        637.1 ns/op      640 B/op        9 allocs/op
 BenchmarkKebab
-BenchmarkKebab-10               1859630        640.6 ns/op      640 B/op        9 allocs/op
+BenchmarkKebab-10               2113995        571.8 ns/op      640 B/op        9 allocs/op
 BenchmarkCamelKebab
-BenchmarkCamelKebab-10          1825042        658.5 ns/op      640 B/op        9 allocs/op
+BenchmarkCamelKebab-10          2047392        586.0 ns/op      640 B/op        9 allocs/op
 BenchmarkScreamingKebab
-BenchmarkScreamingKebab-10      1685986        713.3 ns/op      640 B/op        9 allocs/op
+BenchmarkScreamingKebab-10      1863102        635.0 ns/op      640 B/op        9 allocs/op
 BenchmarkLower
-BenchmarkLower-10               1862577        640.1 ns/op      640 B/op        9 allocs/op
+BenchmarkLower-10               2107701        566.4 ns/op      640 B/op        9 allocs/op
 BenchmarkTitle
-BenchmarkTitle-10               1818093        657.6 ns/op      640 B/op        9 allocs/op
+BenchmarkTitle-10               2056044        584.0 ns/op      640 B/op        9 allocs/op
 BenchmarkScreaming
-BenchmarkScreaming-10           1647198        725.4 ns/op      640 B/op        9 allocs/op
+BenchmarkScreaming-10           1887225        644.4 ns/op      640 B/op        9 allocs/op
 PASS
 ```
diff --git a/casbab.go b/casbab.go
@@ -211,11 +211,10 @@ func scream(s [][]rune) [][]rune {
 
 func camel(s [][]rune, start int) [][]rune {
 	for i := start; i < len(s); i++ {
-		r := []rune(s[i])
-		if len(r) == 0 {
+		if len(s[i]) == 0 {
 			continue
 		}
-		s[i][0] = unicode.ToUpper(r[0])
+		s[i][0] = unicode.ToUpper(s[i][0])
 	}
 	return s
 }
@@ -260,9 +259,14 @@ func join(elems [][]rune) string {
 	}
 
 	var b strings.Builder
-	b.WriteString(string(elems[0]))
+
+	for _, e := range elems[0] {
+		b.WriteRune(e)
+	}
 	for _, s := range elems[1:] {
-		b.WriteString(string(s))
+		for _, e := range s {
+			b.WriteRune(e)
+		}
 	}
 	return b.String()
 }
@@ -276,15 +280,20 @@ func joinSep(elems [][]rune, sep rune) string {
 	}
 
 	var b strings.Builder
-	b.WriteString(string(elems[0]))
+
+	for _, e := range elems[0] {
+		b.WriteRune(e)
+	}
 	for _, s := range elems[1:] {
 		b.WriteRune(sep)
-		b.WriteString(string(s))
+		for _, e := range s {
+			b.WriteRune(e)
+		}
 	}
 	return b.String()
 }
 
-func joinWrap(elems [][]rune, sep rune, prefixSize, suffixSize int) string {
+func joinWrap(elems [][]rune, sep rune, head, tail int) string {
 	switch len(elems) {
 	case 0:
 		return ""
@@ -294,17 +303,21 @@ func joinWrap(elems [][]rune, sep rune, prefixSize, suffixSize int) string {
 
 	var b strings.Builder
 
-	for i := 0; i < prefixSize; i++ {
+	for i := 0; i < head; i++ {
 		b.WriteRune(sep)
 	}
 
-	b.WriteString(string(elems[0]))
+	for _, e := range elems[0] {
+		b.WriteRune(e)
+	}
 	for _, s := range elems[1:] {
 		b.WriteRune(sep)
-		b.WriteString(string(s))
+		for _, e := range s {
+			b.WriteRune(e)
+		}
 	}
 
-	for i := 0; i < suffixSize; i++ {
+	for i := 0; i < tail; i++ {
 		b.WriteRune(sep)
 	}
 	return b.String()