Use Highway SIMD

cmake/targets/BuildBun.cmake

@@ -1089,6 +1089,7 @@ set(BUN_DEPENDENCIES
   BoringSSL
   Brotli
   Cares
+  Highway
   LibDeflate
   LolHtml
   Lshpack

cmake/targets/BuildHighway.cmake

@@ -0,0 +1,33 @@
+register_repository(
+  NAME
+    highway
+  REPOSITORY
+    google/highway
+  COMMIT
+    12b325bc1793dee68ab2157995a690db859fe9e0
+)
+
+set(HIGHWAY_CMAKE_ARGS
+  # Build a static library
+  -DBUILD_SHARED_LIBS=OFF
+  # Enable position-independent code for linking into the main executable
+  -DCMAKE_POSITION_INDEPENDENT_CODE=ON
+  # Disable unnecessary components
+  -DHWY_ENABLE_TESTS=OFF
+  -DHWY_ENABLE_EXAMPLES=OFF
+  -DHWY_ENABLE_CONTRIB=OFF
+  # Disable building of the install target
+  -DHWY_ENABLE_INSTALL=OFF
+)
+
+register_cmake_command(
+  TARGET
+    highway
+  LIBRARIES
+    hwy
+  ARGS
+    ${HIGHWAY_CMAKE_ARGS}
+  INCLUDES
+    .
+    hwy
+)

src/bun.js/bindings/bun-simdutf.cpp

@@ -367,4 +367,10 @@ SIMDUTFResult simdutf__base64_decode_from_binary16(const char16_t* input, size_t
 
     return { .error = res.error, .count = res.count };
 }
+
+size_t simdutf__utf16_length_from_latin1(const char* input, size_t length)
+{
+    UNUSED_PARAM(input);
+    return simdutf::utf16_length_from_latin1(length);
+}
 }

src/bun.js/bindings/bun-simdutf.zig

@@ -95,6 +95,7 @@ pub extern fn simdutf__utf8_length_from_utf32(input: [*c]const c_uint, length: u
 pub extern fn simdutf__utf16_length_from_utf32(input: [*c]const c_uint, length: usize) usize;
 pub extern fn simdutf__utf32_length_from_utf8(input: [*]const u8, length: usize) usize;
 pub extern fn simdutf__utf8_length_from_latin1(input: [*]const u8, length: usize) usize;
+pub extern fn simdutf__utf16_length_from_latin1(input: [*]const u8, length: usize) usize;
 
 pub const validate = struct {
     pub const with_errors = struct {
@@ -295,6 +296,10 @@ pub const length = struct {
                 JSC.markBinding(@src());
                 return simdutf__utf16_length_from_utf32(input.ptr, input.len);
             }
+
+            pub fn latin1(input: []const u8) usize {
+                return simdutf__utf16_length_from_latin1(input.ptr, input.len);
+            }
         };
     };