Minor perf tweak

tbkka · tbkka · commit 8393f0639c9a · 2025-12-08T08:02:49.000Z
diff --git a/stdlib/public/core/FloatingPointFromString.swift b/stdlib/public/core/FloatingPointFromString.swift
@@ -929,7 +929,7 @@ fileprivate func fastParse64(
   }
 
   // Parse an exponent phrase "e+123"
-  if i < input.count && (input[i] | 0x20) == 0x65 { // 'e' or 'E'
+  if unsafe i < input.count && (input[unchecked: i] | 0x20) == 0x65 { // 'e' or 'E'
     i &+= 1
     var exponentSign = Int32(1)
     if i >= input.count {

Original file line number	Diff line number	Diff line change
`@@ -929,7 +929,7 @@ fileprivate func fastParse64(`
`929`	`929`	`}`
`930`	`930`
`931`	`931`	`// Parse an exponent phrase "e+123"`
`932`		`- if i < input.count && (input[i] \| 0x20) == 0x65 { // 'e' or 'E'`
	`932`	`+ if unsafe i < input.count && (input[unchecked: i] \| 0x20) == 0x65 { // 'e' or 'E'`
`933`	`933`	`i &+= 1`
`934`	`934`	`var exponentSign = Int32(1)`
`935`	`935`	`if i >= input.count {`