perf(parser): Speed up UTF-8 validation

Cargo.lock

@@ -1318,6 +1318,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "simdutf8"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f4f3d445e9015cf5e72cec4a3b3a84f8d54f34207afee609fd152de1c0212b1"
+
 [[package]]
 name = "siphasher"
 version = "0.3.3"
@@ -1496,6 +1502,7 @@ dependencies = [
  "once_cell",
  "regex",
  "serde",
+ "simdutf8",
  "thiserror",
  "unicode-segmentation",
 ]

crates/typos/Cargo.toml

@@ -20,6 +20,7 @@ thiserror = "1.0"
 regex = "1.3"
 once_cell = "1.2.0"
 serde = { version = "1.0", features = ["derive"] }
+simdutf8 = "0.1.1"
 itertools = "0.10"
 log = "0.4"
 unicode-segmentation = "1.7.1"

crates/typos/src/tokens.rs

@@ -158,7 +158,7 @@ impl<'s> Iterator for Utf8Chunks<'s> {
             if self.source.is_empty() {
                 return None;
             }
-            match std::str::from_utf8(self.source) {
+            match simdutf8::compat::from_utf8(self.source) {
                 Ok(valid) => {
                     self.source = b"";
                     return Some(valid);