Improve performance for const schemas

benchmark/bench.js

@@ -213,6 +213,60 @@ const benchmarks = [
       n5: 42,
       b5: true
     }
+  },
+  {
+    name: 'object with const string property',
+    schema: {
+      type: 'object',
+      properties: {
+        a: { const: 'const string' }
+      }
+    },
+    input: { a: 'const string' }
+  },
+  {
+    name: 'object with const number property',
+    schema: {
+      type: 'object',
+      properties: {
+        a: { const: 1 }
+      }
+    },
+    input: { a: 1 }
+  },
+  {
+    name: 'object with const bool property',
+    schema: {
+      type: 'object',
+      properties: {
+        a: { const: true }
+      }
+    },
+    input: { a: true }
+  },
+  {
+    name: 'object with const object property',
+    schema: {
+      type: 'object',
+      properties: {
+        foo: { const: { bar: 'baz' } }
+      }
+    },
+    input: {
+      foo: { bar: 'baz' }
+    }
+  },
+  {
+    name: 'object with const null property',
+    schema: {
+      type: 'object',
+      properties: {
+        foo: { const: null }
+      }
+    },
+    input: {
+      foo: null
+    }
   }
 ]
 
@@ -222,10 +276,10 @@ async function runBenchmark (benchmark) {
   return new Promise((resolve, reject) => {
     let result = null
     worker.on('error', reject)
-    worker.on('message', (benchResult) => {
+    worker.on('message', benchResult => {
       result = benchResult
     })
-    worker.on('exit', (code) => {
+    worker.on('exit', code => {
       if (code === 0) {
         resolve(result)
       } else {

example.js

@@ -61,19 +61,21 @@ const stringify = fastJson({
   }
 })
 
-console.log(stringify({
-  firstName: 'Matteo',
-  lastName: 'Collina',
-  age: 32,
-  now: new Date(),
-  reg: /"([^"]|\\")*"/,
-  foo: 'hello',
-  numfoo: 42,
-  test: 42,
-  strtest: '23',
-  arr: [{ str: 'stark' }, { str: 'lannister' }],
-  obj: { bool: true },
-  notmatch: 'valar morghulis',
-  notmatchobj: { a: true },
-  notmatchnum: 42
-}))
+console.log(
+  stringify({
+    firstName: 'Matteo',
+    lastName: 'Collina',
+    age: 32,
+    now: new Date(),
+    reg: /"([^"]|\\")*"/,
+    foo: 'hello',
+    numfoo: 42,
+    test: 42,
+    strtest: '23',
+    arr: [{ str: 'stark' }, { str: 'lannister' }],
+    obj: { bool: true },
+    notmatch: 'valar morghulis',
+    notmatchobj: { a: true },
+    notmatchnum: 42
+  })
+)