From bc028168a815977830460983f28aefa4f7605c5e Mon Sep 17 00:00:00 2001
From: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>
Date: Sat, 3 Dec 2022 08:24:33 -0800
Subject: [PATCH] simdutf ascii validation is about 20% faster on arm64 than
 our zig simd @Vector version

---
 src/string_immutable.zig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/string_immutable.zig b/src/string_immutable.zig
index f89e6d12ff..6187640729 100644
--- a/src/string_immutable.zig
+++ b/src/string_immutable.zig
@@ -2639,6 +2639,9 @@ pub const AsciiVectorU16U1 = std.meta.Vector(ascii_u16_vector_size, u1);
 pub const AsciiU16Vector = std.meta.Vector(ascii_u16_vector_size, u16);
 pub const max_4_ascii = @splat(4, @as(u8, 127));
 pub fn isAllASCII(slice: []const u8) bool {
+    if (bun.FeatureFlags.use_simdutf)
+        return bun.simdutf.validate.ascii(slice);
+
     var remaining = slice;
 
     // The NEON SIMD unit is 128-bit wide and includes 16 128-bit registers that can be used as 32 64-bit registers