Run results for: JSON.parse(JSON.stringify()) vs structuredClone

Run details:
User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3 Safari/605.1.15
Browser: Safari 17
Operating system: Mac OS X 10.15.7
Device Platform: Desktop
Date tested: 10 months ago
Test name	Executions per second
JSON	18082.9 Ops/sec
structuredClone	10128.3 Ops/sec
Script Preparation code:
var myObject = {
  "name": "next",
  "version": "14.1.0",
  "description": "The React Framework",
  "main": "./dist/server/next.js",
  "license": "MIT",
  "repository": "vercel/next.js",
  "bugs": "https://github.com/vercel/next.js/issues",
  "homepage": "https://nextjs.org",
  "types": "index.d.ts",
  "files": [
    "dist",
    "app.js",
    "app.d.ts",
    "babel.js",
    "babel.d.ts",
    "client.js",
    "client.d.ts",
    "compat",
    "cache.js",
    "cache.d.ts",
    "config.js",
    "config.d.ts",
    "constants.js",
    "constants.d.ts",
    "document.js",
    "document.d.ts",
    "dynamic.js",
    "dynamic.d.ts",
    "error.js",
    "error.d.ts",
    "future",
    "legacy",
    "script.js",
    "script.d.ts",
    "server.js",
    "server.d.ts",
    "head.js",
    "head.d.ts",
    "image.js",
    "image.d.ts",
    "link.js",
    "link.d.ts",
    "router.js",
    "router.d.ts",
    "jest.js",
    "jest.d.ts",
    "amp.js",
    "amp.d.ts",
    "og.js",
    "og.d.ts",
    "index.d.ts",
    "types/index.d.ts",
    "types/global.d.ts",
    "types/compiled.d.ts",
    "image-types/global.d.ts",
    "navigation-types/navigation.d.ts",
    "navigation-types/compat/navigation.d.ts",
    "font",
    "navigation.js",
    "navigation.d.ts",
    "headers.js",
    "headers.d.ts",
    "navigation-types",
    "web-vitals.js",
    "web-vitals.d.ts",
    "experimental/testmode/playwright.js",
    "experimental/testmode/playwright.d.ts",
    "experimental/testmode/playwright/msw.js",
    "experimental/testmode/playwright/msw.d.ts",
    "experimental/testmode/proxy.js",
    "experimental/testmode/proxy.d.ts"
  ],
  "bin": {
    "next": "./dist/bin/next"
  },
  "scripts": {
    "dev": "taskr",
    "release": "taskr release",
    "build": "pnpm release",
    "prepublishOnly": "cd ../../ && turbo run build",
    "types": "tsc --declaration --emitDeclarationOnly --stripInternal --declarationDir dist",
    "typescript": "tsec --noEmit",
    "ncc-compiled": "ncc cache clean && taskr ncc"
  },
  "taskr": {
    "requires": [
      "./taskfile-webpack.js",
      "./taskfile-ncc.js",
      "./taskfile-swc.js",
      "./taskfile-watch.js"
    ]
  },
  "dependencies": {
    "@next/env": "14.1.0",
    "@swc/helpers": "0.5.2",
    "busboy": "1.6.0",
    "caniuse-lite": "^1.0.30001579",
    "graceful-fs": "^4.2.11",
    "postcss": "8.4.31",
    "styled-jsx": "5.1.1"
  },
  "peerDependencies": {
    "@opentelemetry/api": "^1.1.0",
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
    "sass": "^1.3.0"
  },
  "peerDependenciesMeta": {
    "sass": {
      "optional": true
    },
    "@opentelemetry/api": {
      "optional": true
    }
  },
  "devDependencies": {
    "@ampproject/toolbox-optimizer": "2.8.3",
    "@babel/code-frame": "7.22.5",
    "@babel/core": "7.22.5",
    "@babel/eslint-parser": "7.22.5",
    "@babel/generator": "7.22.5",
    "@babel/plugin-proposal-class-properties": "7.18.6",
    "@babel/plugin-proposal-export-namespace-from": "7.18.9",
    "@babel/plugin-proposal-numeric-separator": "7.18.6",
    "@babel/plugin-proposal-object-rest-spread": "7.20.7",
    "@babel/plugin-syntax-bigint": "7.8.3",
    "@babel/plugin-syntax-dynamic-import": "7.8.3",
    "@babel/plugin-syntax-import-assertions": "7.22.5",
    "@babel/plugin-syntax-jsx": "7.22.5",
    "@babel/plugin-transform-modules-commonjs": "7.22.5",
    "@babel/plugin-transform-runtime": "7.22.5",
    "@babel/preset-env": "7.22.5",
    "@babel/preset-react": "7.22.5",
    "@babel/preset-typescript": "7.22.5",
    "@babel/runtime": "7.22.5",
    "@babel/traverse": "7.22.5",
    "@babel/types": "7.22.5",
    "@capsizecss/metrics": "1.1.0",
    "@edge-runtime/cookies": "4.0.2",
    "@edge-runtime/ponyfill": "2.4.1",
    "@edge-runtime/primitives": "4.0.2",
    "@hapi/accept": "5.0.2",
    "@jest/transform": "29.5.0",
    "@jest/types": "29.5.0",
    "@mswjs/interceptors": "0.23.0",
    "@napi-rs/cli": "2.16.2",
    "@napi-rs/triples": "1.1.0",
    "@next/polyfill-module": "14.1.0",
    "@next/polyfill-nomodule": "14.1.0",
    "@next/react-dev-overlay": "14.1.0",
    "@next/react-refresh-utils": "14.1.0",
    "@next/swc": "14.1.0",
    "@opentelemetry/api": "1.6.0",
    "@playwright/test": "^1.35.1",
    "@taskr/clear": "1.1.0",
    "@taskr/esnext": "1.1.0",
    "@types/amphtml-validator": "1.0.0",
    "@types/babel__code-frame": "7.0.2",
    "@types/babel__core": "7.1.12",
    "@types/babel__generator": "7.6.2",
    "@types/babel__template": "7.4.0",
    "@types/babel__traverse": "7.11.0",
    "@types/bytes": "3.1.1",
    "@types/ci-info": "2.0.0",
    "@types/compression": "0.0.36",
    "@types/content-disposition": "0.5.4",
    "@types/content-type": "1.1.3",
    "@types/cookie": "0.3.3",
    "@types/cross-spawn": "6.0.0",
    "@types/debug": "4.1.5",
    "@types/express-serve-static-core": "4.17.33",
    "@types/fresh": "0.5.0",
    "@types/glob": "7.1.1",
    "@types/graceful-fs": "4.1.9",
    "@types/jsonwebtoken": "9.0.0",
    "@types/lodash": "4.14.198",
    "@types/lodash.curry": "4.1.6",
    "@types/lru-cache": "5.1.0",
    "@types/micromatch": "4.0.2",
    "@types/path-to-regexp": "1.7.0",
    "@types/platform": "1.3.4",
    "@types/react": "18.2.37",
    "@types/react-dom": "18.2.15",
    "@types/react-is": "17.0.3",
    "@types/semver": "7.3.1",
    "@types/send": "0.14.4",
    "@types/shell-quote": "1.7.1",
    "@types/tar": "6.1.5",
    "@types/text-table": "0.2.1",
    "@types/ua-parser-js": "0.7.36",
    "@types/uuid": "8.3.1",
    "@types/webpack-sources1": "npm:@types/webpack-sources@0.1.5",
    "@types/ws": "8.2.0",
    "@vercel/ncc": "0.34.0",
    "@vercel/nft": "0.26.2",
    "@vercel/turbopack-ecmascript-runtime": "https://gitpkg-fork.vercel.sh/vercel/turbo/crates/turbopack-ecmascript-runtime/js?turbopack-240117.3",
    "acorn": "8.5.0",
    "amphtml-validator": "1.0.35",
    "anser": "1.4.9",
    "arg": "4.1.0",
    "assert": "2.0.0",
    "async-retry": "1.2.3",
    "async-sema": "3.0.0",
    "babel-plugin-transform-define": "2.0.0",
    "babel-plugin-transform-react-remove-prop-types": "0.4.24",
    "browserify-zlib": "0.2.0",
    "browserslist": "4.22.2",
    "buffer": "5.6.0",
    "bytes": "3.1.1",
    "ci-info": "watson/ci-info#f43f6a1cefff47fb361c88cf4b943fdbcaafe540",
    "cli-select": "1.1.2",
    "client-only": "0.0.1",
    "comment-json": "3.0.3",
    "compression": "1.7.4",
    "conf": "5.0.0",
    "constants-browserify": "1.0.0",
    "content-disposition": "0.5.3",
    "content-type": "1.0.4",
    "cookie": "0.4.1",
    "cross-spawn": "7.0.3",
    "crypto-browserify": "3.12.0",
    "css.escape": "1.5.1",
    "cssnano-preset-default": "5.2.14",
    "data-uri-to-buffer": "3.0.1",
    "debug": "4.1.1",
    "devalue": "2.0.1",
    "domain-browser": "4.19.0",
    "edge-runtime": "2.5.4",
    "events": "3.3.0",
    "find-up": "4.1.0",
    "fresh": "0.5.2",
    "get-orientation": "1.1.2",
    "glob": "7.1.7",
    "gzip-size": "5.1.1",
    "http-proxy": "1.18.1",
    "http-proxy-agent": "5.0.0",
    "https-browserify": "1.0.0",
    "https-proxy-agent": "5.0.1",
    "icss-utils": "5.1.0",
    "ignore-loader": "0.1.2",
    "image-size": "1.0.0",
    "is-docker": "2.0.0",
    "is-wsl": "2.2.0",
    "jest-worker": "27.5.1",
    "json5": "2.2.3",
    "jsonwebtoken": "9.0.0",
    "loader-runner": "4.3.0",
    "loader-utils2": "npm:loader-utils@2.0.0",
    "loader-utils3": "npm:loader-utils@3.1.3",
    "lodash.curry": "4.1.1",
    "lru-cache": "5.1.1",
    "micromatch": "4.0.4",
    "mini-css-extract-plugin": "2.4.3",
    "msw": "1.3.0",
    "nanoid": "3.1.32",
    "native-url": "0.3.4",
    "neo-async": "2.6.1",
    "node-html-parser": "5.3.3",
    "ora": "4.0.4",
    "os-browserify": "0.3.0",
    "p-limit": "3.1.0",
    "path-browserify": "1.0.1",
    "path-to-regexp": "6.1.0",
    "platform": "1.3.6",
    "postcss-flexbugs-fixes": "5.0.2",
    "postcss-modules-extract-imports": "3.0.0",
    "postcss-modules-local-by-default": "4.0.0",
    "postcss-modules-scope": "3.0.0",
    "postcss-modules-values": "4.0.0",
    "postcss-preset-env": "7.4.3",
    "postcss-safe-parser": "6.0.0",
    "postcss-scss": "4.0.3",
    "postcss-value-parser": "4.2.0",
    "process": "0.11.10",
    "punycode": "2.1.1",
    "querystring-es3": "0.2.1",
    "raw-body": "2.4.1",
    "react-is": "18.2.0",
    "react-refresh": "0.12.0",
    "regenerator-runtime": "0.13.4",
    "sass-loader": "12.4.0",
    "schema-utils2": "npm:schema-utils@2.7.1",
    "schema-utils3": "npm:schema-utils@3.0.0",
    "semver": "7.3.2",
    "send": "0.17.1",
    "server-only": "0.0.1",
    "setimmediate": "1.0.5",
    "shell-quote": "1.7.3",
    "source-map": "0.6.1",
    "stacktrace-parser": "0.1.10",
    "stream-browserify": "3.0.0",
    "stream-http": "3.1.1",
    "strict-event-emitter": "0.5.0",
    "string-hash": "1.1.3",
    "string_decoder": "1.3.0",
    "strip-ansi": "6.0.0",
    "superstruct": "1.0.3",
    "tar": "6.1.15",
    "taskr": "1.1.0",
    "terser": "5.14.1",
    "terser-webpack-plugin": "5.3.9",
    "text-table": "0.2.0",
    "timers-browserify": "2.0.12",
    "tty-browserify": "0.0.1",
    "ua-parser-js": "1.0.35",
    "unistore": "3.4.1",
    "util": "0.12.4",
    "uuid": "8.3.2",
    "vm-browserify": "1.1.2",
    "watchpack": "2.4.0",
    "web-vitals": "3.0.0",
    "webpack": "5.86.0",
    "webpack-sources1": "npm:webpack-sources@1.4.3",
    "webpack-sources3": "npm:webpack-sources@3.2.3",
    "ws": "8.2.3",
    "zod": "3.22.3"
  },
  "engines": {
    "node": ">=18.17.0"
  },
  "optionalDependencies": {
    "@next/swc-darwin-arm64": "14.1.0",
    "@next/swc-darwin-x64": "14.1.0",
    "@next/swc-linux-arm64-gnu": "14.1.0",
    "@next/swc-linux-arm64-musl": "14.1.0",
    "@next/swc-linux-x64-gnu": "14.1.0",
    "@next/swc-linux-x64-musl": "14.1.0",
    "@next/swc-win32-arm64-msvc": "14.1.0",
    "@next/swc-win32-ia32-msvc": "14.1.0",
    "@next/swc-win32-x64-msvc": "14.1.0"
  }
}

var clone;
Tests:
JSON
clone = JSON.parse(JSON.stringify(myObject))
structuredClone
clone = structuredClone(myObject)
Run results for: JSON.parse(JSON.stringify()) vs structuredClone

cloneDeep

JSON

structuredClone
