diff --git a/.github/workflows/ci-and-publish.yml b/.github/workflows/ci-and-publish.yml
index 86ab67a..42bace1 100644
--- a/.github/workflows/ci-and-publish.yml
+++ b/.github/workflows/ci-and-publish.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [12.x, 14.x, 16.x, 18.x, 20.x]
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node-version }}
@@ -31,7 +31,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           cache: npm
       - run: npm ci
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e31d6f9..2c19edb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [12.x, 14.x, 16.x, 18.x, 20.x]
     steps:
       - uses: actions/checkout@v3
       - name: Use Node.js ${{ matrix.node-version }}
diff --git a/README.md b/README.md
index da43bb1..07cb59c 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,7 @@ Sources: [classix](https://deno.bundlejs.com?q=classix), [clsx](https://deno.bun
 
 ![Performance comparison chart](media/perf.png)
 
-Sources: Ran [benchmark](benchmark/) on an AMD Ryzen 5 5600x.
+Sources: Ran [benchmark](benchmark/) on an AMD Ryzen 5 5600x with Node 20.
 
 ## Highlights
 
diff --git a/benchmark/index.mjs b/benchmark/index.mjs
index 028a195..8e4d9d5 100644
--- a/benchmark/index.mjs
+++ b/benchmark/index.mjs
@@ -1,14 +1,69 @@
-import benchmark from "benchmark";
+import { performance } from "node:perf_hooks";
 import classnames from "classnames";
 import { clsx } from "clsx";
 import { cx } from "classix";
 
 import { cx as cxLocal } from "../dist/esm/classix.mjs";
 
-new benchmark.Suite()
-  .add("classnames", () => classnames("class1", true && "class2"))
-  .add("clsx", () => clsx("class1", true && "class2"))
-  .add("classix", () => cx("class1", true && "class2"))
-  .add("classix (local)", () => cxLocal("class1", true && "class2"))
-  .on("cycle", (event) => console.log(event.target.toString()))
-  .run();
+const NB_RUN = 100_000_000;
+
+function logResult(name, ms) {
+  const millionsOfOpsPerSecond = ((NB_RUN * 1000) / ms / 1_000_000).toFixed(1);
+  console.log(`${name}: ${millionsOfOpsPerSecond}M ops/s`);
+}
+
+// Repetition of code was used as to not affect performance
+let start = 0;
+let stop = 0;
+
+start = performance.now();
+for (let i = 0; i < NB_RUN; i++) {
+  classnames("class-1", { "class-2": true });
+}
+stop = performance.now();
+logResult("classnames (object)", stop - start);
+
+//
+
+start = performance.now();
+for (let i = 0; i < NB_RUN; i++) {
+  classnames("class-1", true && "class-2");
+}
+stop = performance.now();
+logResult("classnames", stop - start);
+
+//
+
+start = performance.now();
+for (let i = 0; i < NB_RUN; i++) {
+  clsx("class-1", { "class-2": true });
+}
+stop = performance.now();
+logResult("clsx (object)", stop - start);
+
+//
+
+start = performance.now();
+for (let i = 0; i < NB_RUN; i++) {
+  clsx("class-1", true && "class-2");
+}
+stop = performance.now();
+logResult("clsx", stop - start);
+
+//
+
+start = performance.now();
+for (let i = 0; i < NB_RUN; i++) {
+  cx("class-1", true && "class-2");
+}
+stop = performance.now();
+logResult("classix", stop - start);
+
+//
+
+start = performance.now();
+for (let i = 0; i < NB_RUN; i++) {
+  cxLocal("class-1", true && "class-2");
+}
+stop = performance.now();
+logResult("classix (local)", stop - start);
diff --git a/media/perf.png b/media/perf.png
index 0235c31..d3111d6 100644
Binary files a/media/perf.png and b/media/perf.png differ
diff --git a/package-lock.json b/package-lock.json
index 259eea9..21054ce 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,6 @@
         "@typescript-eslint/eslint-plugin": "^5.30.5",
         "@typescript-eslint/parser": "^5.30.5",
         "@vitest/coverage-c8": "^0.30.1",
-        "benchmark": "^2.1.4",
         "classix": "^2.1.8",
         "classnames": "^2.3.1",
         "clsx": "^1.2.1",
@@ -1818,16 +1817,6 @@
       "integrity": "sha512-NzUnlZexiaH/46WDhANlyR2bXRopNg4F/zuSA3OpZnllCUgRaOF2znDioDWrmbNVsuZk6l9pMquQB38cfBZwkQ==",
       "dev": true
     },
-    "node_modules/benchmark": {
-      "version": "2.1.4",
-      "resolved": "https://registry.npmjs.org/benchmark/-/benchmark-2.1.4.tgz",
-      "integrity": "sha512-l9MlfN4M1K/H2fbhfMy3B7vJd6AGKJVQn2h6Sg/Yx+KckoUA7ewS5Vv6TjSq18ooE1kS9hhAlQRH3AkXIh/aOQ==",
-      "dev": true,
-      "dependencies": {
-        "lodash": "^4.17.4",
-        "platform": "^1.3.3"
-      }
-    },
     "node_modules/binary-extensions": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
@@ -7590,12 +7579,6 @@
         "pathe": "^1.1.0"
       }
     },
-    "node_modules/platform": {
-      "version": "1.3.6",
-      "resolved": "https://registry.npmjs.org/platform/-/platform-1.3.6.tgz",
-      "integrity": "sha512-fnWVljUchTro6RiCFvCXBbNhJc2NijN7oIQxbwsyL0buWJPG85v81ehlHI9fXrJsMNgTofEoWIQeClKpgxFLrg==",
-      "dev": true
-    },
     "node_modules/postcss": {
       "version": "8.4.21",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
@@ -10596,16 +10579,6 @@
       "integrity": "sha512-NzUnlZexiaH/46WDhANlyR2bXRopNg4F/zuSA3OpZnllCUgRaOF2znDioDWrmbNVsuZk6l9pMquQB38cfBZwkQ==",
       "dev": true
     },
-    "benchmark": {
-      "version": "2.1.4",
-      "resolved": "https://registry.npmjs.org/benchmark/-/benchmark-2.1.4.tgz",
-      "integrity": "sha512-l9MlfN4M1K/H2fbhfMy3B7vJd6AGKJVQn2h6Sg/Yx+KckoUA7ewS5Vv6TjSq18ooE1kS9hhAlQRH3AkXIh/aOQ==",
-      "dev": true,
-      "requires": {
-        "lodash": "^4.17.4",
-        "platform": "^1.3.3"
-      }
-    },
     "binary-extensions": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
@@ -14700,12 +14673,6 @@
         "pathe": "^1.1.0"
       }
     },
-    "platform": {
-      "version": "1.3.6",
-      "resolved": "https://registry.npmjs.org/platform/-/platform-1.3.6.tgz",
-      "integrity": "sha512-fnWVljUchTro6RiCFvCXBbNhJc2NijN7oIQxbwsyL0buWJPG85v81ehlHI9fXrJsMNgTofEoWIQeClKpgxFLrg==",
-      "dev": true
-    },
     "postcss": {
       "version": "8.4.21",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
diff --git a/package.json b/package.json
index 2347a4f..77de6dc 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,6 @@
     "@typescript-eslint/eslint-plugin": "^5.30.5",
     "@typescript-eslint/parser": "^5.30.5",
     "@vitest/coverage-c8": "^0.30.1",
-    "benchmark": "^2.1.4",
     "classix": "^2.1.8",
     "classnames": "^2.3.1",
     "clsx": "^1.2.1",