perf: simd-json (#115)

Author: SyMind

Cargo.lock

@@ -39,6 +39,7 @@ memchr = "2.6.4"
 arrayvec = "0.7.4"
 
 codspeed-criterion-compat = { version = "2.3.3", default-features = false, optional = true }
+simd-json = "=0.14.0-rc.2"
 
 [dev-dependencies]
 twox-hash = "1"

Cargo.toml

@@ -13,7 +13,7 @@ pub enum Error {
   /// Overflow in Vlq handling
   VlqOverflow,
   /// a JSON parsing related failure
-  BadJson(serde_json::Error),
+  BadJson(simd_json::Error),
 }
 
 impl fmt::Display for Error {
@@ -29,8 +29,8 @@ impl fmt::Display for Error {
 
 impl error::Error for Error {}
 
-impl From<serde_json::Error> for Error {
-  fn from(err: serde_json::Error) -> Error {
+impl From<simd_json::Error> for Error {
+  fn from(err: simd_json::Error) -> Error {
     Error::BadJson(err)
   }
 }

src/error.rs

@@ -343,27 +343,29 @@ struct RawSourceMap {
 
 impl RawSourceMap {
   pub fn from_reader<R: std::io::Read>(r: R) -> Result<Self> {
-    let raw: RawSourceMap = serde_json::from_reader(r)?;
+    let raw: RawSourceMap = simd_json::serde::from_reader(r)?;
     Ok(raw)
   }
 
-  pub fn from_slice(v: &[u8]) -> Result<Self> {
-    let raw: RawSourceMap = serde_json::from_slice(v)?;
+  pub fn from_slice(val: &[u8]) -> Result<Self> {
+    let mut v = val.to_vec();
+    let raw: RawSourceMap = simd_json::serde::from_slice(&mut v)?;
     Ok(raw)
   }
 
-  pub fn from_json(s: &str) -> Result<Self> {
-    let raw: RawSourceMap = serde_json::from_str(s)?;
+  pub fn from_json(val: &str) -> Result<Self> {
+    let mut v = val.as_bytes().to_vec();
+    let raw: RawSourceMap = simd_json::serde::from_slice(&mut v)?;
     Ok(raw)
   }
 
   pub fn to_json(&self) -> Result<String> {
-    let json = serde_json::to_string(self)?;
+    let json = simd_json::serde::to_string(self)?;
     Ok(json)
   }
 
   pub fn to_writer<W: std::io::Write>(&self, w: W) -> Result<()> {
-    serde_json::to_writer(w, self)?;
+    simd_json::to_writer(w, self)?;
     Ok(())
   }
 }