perf: Remove unused private field in `JSONSchema`

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Performance
+
+- Remove unused private field in `JSONSchema`, that lead to improvement in the compilation performance.
+
 ## [0.13.2] - 2021-11-04
 
 ### Added

jsonschema/src/compilation/mod.rs

@@ -19,7 +19,6 @@ use ahash::AHashMap;
 use context::CompilationContext;
 use options::CompilationOptions;
 use serde_json::Value;
-use std::sync::Arc;
 use url::Url;
 
 pub(crate) const DEFAULT_ROOT_URL: &str = "json-schema:///";
@@ -27,7 +26,6 @@ pub(crate) const DEFAULT_ROOT_URL: &str = "json-schema:///";
 /// The structure that holds a JSON Schema compiled into a validation tree
 #[derive(Debug)]
 pub struct JSONSchema {
-    pub(crate) schema: Arc<Value>,
     pub(crate) node: SchemaNode,
     pub(crate) resolver: Resolver,
     config: CompilationOptions,

jsonschema/src/compilation/options.rs

@@ -270,7 +270,7 @@ impl CompilationOptions {
             None => DEFAULT_SCOPE.clone(),
         };
         let schema_json = Arc::new(schema.clone());
-        let resolver = Resolver::new(draft, &scope, schema_json.clone(), self.store.clone())?;
+        let resolver = Resolver::new(draft, &scope, schema_json, self.store.clone())?;
         let context = CompilationContext::new(scope.into(), &config);
 
         if self.validate_schema {
@@ -287,7 +287,6 @@ impl CompilationOptions {
         let node = compile_validators(schema, &context)?;
 
         Ok(JSONSchema {
-            schema: schema_json,
             node,
             resolver,
             config,