diff --git a/README.md b/README.md
index c28ed31..e7a54bf 100644
--- a/README.md
+++ b/README.md
@@ -64,77 +64,77 @@ assert.deepEqual(traced, [5, 0, 41, 4, 0]);
 ## Benchmarks
 
 ```
-node v16.13.0
+node v18.0.0
 
 amp.js.map
-trace-mapping:    decoded JSON input x 41.68 ops/sec ±20.44% (38 runs sampled)
-trace-mapping:    encoded JSON input x 32.20 ops/sec ±45.61% (26 runs sampled)
-trace-mapping:    decoded Object input x 409 ops/sec ±17.04% (38 runs sampled)
-trace-mapping:    encoded Object input x 104 ops/sec ±16.38% (38 runs sampled)
-source-map-js:    encoded Object input x 10.78 ops/sec ±25.34% (22 runs sampled)
-source-map-0.6.1: encoded Object input x 5.16 ops/sec ±18.91% (18 runs sampled)
+trace-mapping:    decoded JSON input x 183 ops/sec ±0.41% (87 runs sampled)
+trace-mapping:    encoded JSON input x 384 ops/sec ±0.89% (89 runs sampled)
+trace-mapping:    decoded Object input x 3,085 ops/sec ±0.24% (100 runs sampled)
+trace-mapping:    encoded Object input x 452 ops/sec ±0.80% (84 runs sampled)
+source-map-js:    encoded Object input x 88.82 ops/sec ±0.45% (77 runs sampled)
+source-map-0.6.1: encoded Object input x 38.39 ops/sec ±1.88% (52 runs sampled)
 Fastest is trace-mapping:    decoded Object input
 
-trace-mapping:    decoded originalPositionFor x 264,268 ops/sec ±14.14% (39 runs sampled)
-trace-mapping:    encoded originalPositionFor x 528,134 ops/sec ±11.70% (59 runs sampled)
-source-map-js:    encoded originalPositionFor x 273,022 ops/sec ±20.39% (68 runs sampled)
-source-map-0.6.1: encoded originalPositionFor x 120,340 ops/sec ±14.28% (41 runs sampled)
-source-map-0.7.3: encoded originalPositionFor x 308,158 ops/sec ±11.84% (64 runs sampled)
-Fastest is trace-mapping:    encoded originalPositionFor
+trace-mapping:    decoded originalPositionFor x 4,025,347 ops/sec ±0.15% (97 runs sampled)
+trace-mapping:    encoded originalPositionFor x 3,333,136 ops/sec ±1.26% (90 runs sampled)
+source-map-js:    encoded originalPositionFor x 824,978 ops/sec ±1.06% (94 runs sampled)
+source-map-0.6.1: encoded originalPositionFor x 741,300 ops/sec ±0.93% (92 runs sampled)
+source-map-0.8.0: encoded originalPositionFor x 2,587,603 ops/sec ±0.75% (97 runs sampled)
+Fastest is trace-mapping:    decoded originalPositionFor
 
 ***
 
 babel.min.js.map
-trace-mapping:    decoded JSON input x 5.52 ops/sec ±21.77% (19 runs sampled)
-trace-mapping:    encoded JSON input x 10.72 ops/sec ±12.76% (27 runs sampled)
-trace-mapping:    decoded Object input x 348 ops/sec ±3.07% (79 runs sampled)
-trace-mapping:    encoded Object input x 9.20 ops/sec ±12.19% (20 runs sampled)
-source-map-js:    encoded Object input x 3.09 ops/sec ±11.56% (12 runs sampled)
-source-map-0.6.1: encoded Object input x 1.74 ops/sec ±14.48% (9 runs sampled)
+trace-mapping:    decoded JSON input x 17.43 ops/sec ±8.81% (33 runs sampled)
+trace-mapping:    encoded JSON input x 34.18 ops/sec ±4.67% (50 runs sampled)
+trace-mapping:    decoded Object input x 1,010 ops/sec ±0.41% (98 runs sampled)
+trace-mapping:    encoded Object input x 39.45 ops/sec ±4.01% (52 runs sampled)
+source-map-js:    encoded Object input x 6.57 ops/sec ±3.04% (21 runs sampled)
+source-map-0.6.1: encoded Object input x 4.23 ops/sec ±2.93% (15 runs sampled)
 Fastest is trace-mapping:    decoded Object input
 
-trace-mapping:    decoded originalPositionFor x 2,898,435 ops/sec ±6.37% (76 runs sampled)
-trace-mapping:    encoded originalPositionFor x 2,499,183 ops/sec ±4.94% (79 runs sampled)
-source-map-js:    encoded originalPositionFor x 141 ops/sec ±195.99% (81 runs sampled)
-source-map-0.6.1: encoded originalPositionFor x 127 ops/sec ±195.99% (75 runs sampled)
-source-map-0.7.3: encoded originalPositionFor x 2,966,966 ops/sec ±12.73% (83 runs sampled)
-Fastest is trace-mapping:    decoded originalPositionFor,source-map-0.7.3: encoded originalPositionFor
+trace-mapping:    decoded originalPositionFor x 7,576,265 ops/sec ±0.74% (96 runs sampled)
+trace-mapping:    encoded originalPositionFor x 5,019,743 ops/sec ±0.74% (94 runs sampled)
+source-map-js:    encoded originalPositionFor x 3,396,137 ops/sec ±42.32% (95 runs sampled)
+source-map-0.6.1: encoded originalPositionFor x 3,753,176 ops/sec ±0.72% (95 runs sampled)
+source-map-0.8.0: encoded originalPositionFor x 6,423,633 ops/sec ±0.74% (95 runs sampled)
+Fastest is trace-mapping:    decoded originalPositionFor
 
 ***
 
 preact.js.map
-trace-mapping:    decoded JSON input x 1,617 ops/sec ±5.57% (79 runs sampled)
-trace-mapping:    encoded JSON input x 3,486 ops/sec ±2.94% (87 runs sampled)
-trace-mapping:    decoded Object input x 136,226 ops/sec ±5.93% (75 runs sampled)
-trace-mapping:    encoded Object input x 7,609 ops/sec ±2.55% (87 runs sampled)
-source-map-js:    encoded Object input x 1,271 ops/sec ±7.33% (78 runs sampled)
-source-map-0.6.1: encoded Object input x 565 ops/sec ±2.98% (83 runs sampled)
+trace-mapping:    decoded JSON input x 3,499 ops/sec ±0.18% (98 runs sampled)
+trace-mapping:    encoded JSON input x 6,078 ops/sec ±0.25% (99 runs sampled)
+trace-mapping:    decoded Object input x 254,788 ops/sec ±0.13% (100 runs sampled)
+trace-mapping:    encoded Object input x 14,063 ops/sec ±0.27% (94 runs sampled)
+source-map-js:    encoded Object input x 2,465 ops/sec ±0.25% (98 runs sampled)
+source-map-0.6.1: encoded Object input x 1,174 ops/sec ±1.90% (95 runs sampled)
 Fastest is trace-mapping:    decoded Object input
 
-trace-mapping:    decoded originalPositionFor x 5,043,368 ops/sec ±5.39% (82 runs sampled)
-trace-mapping:    encoded originalPositionFor x 4,278,674 ops/sec ±8.18% (86 runs sampled)
-source-map-js:    encoded originalPositionFor x 1,315,722 ops/sec ±8.02% (80 runs sampled)
-source-map-0.6.1: encoded originalPositionFor x 748,765 ops/sec ±3.29% (87 runs sampled)
-source-map-0.7.3: encoded originalPositionFor x 1,560,329 ops/sec ±3.83% (85 runs sampled)
+trace-mapping:    decoded originalPositionFor x 7,720,171 ops/sec ±0.14% (97 runs sampled)
+trace-mapping:    encoded originalPositionFor x 6,864,485 ops/sec ±0.16% (101 runs sampled)
+source-map-js:    encoded originalPositionFor x 2,387,219 ops/sec ±0.28% (98 runs sampled)
+source-map-0.6.1: encoded originalPositionFor x 1,565,339 ops/sec ±0.32% (101 runs sampled)
+source-map-0.8.0: encoded originalPositionFor x 3,819,732 ops/sec ±0.38% (98 runs sampled)
 Fastest is trace-mapping:    decoded originalPositionFor
 
 ***
 
 react.js.map
-trace-mapping:    decoded JSON input x 788 ops/sec ±4.57% (84 runs sampled)
-trace-mapping:    encoded JSON input x 2,117 ops/sec ±3.07% (82 runs sampled)
-trace-mapping:    decoded Object input x 38,526 ops/sec ±3.91% (75 runs sampled)
-trace-mapping:    encoded Object input x 2,806 ops/sec ±2.80% (88 runs sampled)
-source-map-js:    encoded Object input x 387 ops/sec ±12.69% (75 runs sampled)
-source-map-0.6.1: encoded Object input x 192 ops/sec ±1.71% (81 runs sampled)
+trace-mapping:    decoded JSON input x 1,719 ops/sec ±0.19% (99 runs sampled)
+trace-mapping:    encoded JSON input x 4,284 ops/sec ±0.51% (99 runs sampled)
+trace-mapping:    decoded Object input x 94,668 ops/sec ±0.08% (99 runs sampled)
+trace-mapping:    encoded Object input x 5,287 ops/sec ±0.24% (99 runs sampled)
+source-map-js:    encoded Object input x 814 ops/sec ±0.20% (98 runs sampled)
+source-map-0.6.1: encoded Object input x 429 ops/sec ±0.24% (94 runs sampled)
 Fastest is trace-mapping:    decoded Object input
 
-trace-mapping:    decoded originalPositionFor x 15,109,060 ops/sec ±6.30% (77 runs sampled)
-trace-mapping:    encoded originalPositionFor x 17,028,124 ops/sec ±4.54% (84 runs sampled)
-source-map-js:    encoded originalPositionFor x 8,912,348 ops/sec ±6.00% (78 runs sampled)
-source-map-0.6.1: encoded originalPositionFor x 6,569,081 ops/sec ±3.61% (82 runs sampled)
-source-map-0.7.3: encoded originalPositionFor x 9,004,404 ops/sec ±6.75% (75 runs sampled)
-Fastest is trace-mapping:    encoded originalPositionFor
+trace-mapping:    decoded originalPositionFor x 28,927,989 ops/sec ±0.61% (94 runs sampled)
+trace-mapping:    encoded originalPositionFor x 27,394,475 ops/sec ±0.55% (97 runs sampled)
+source-map-js:    encoded originalPositionFor x 16,856,730 ops/sec ±0.45% (96 runs sampled)
+source-map-0.6.1: encoded originalPositionFor x 12,258,950 ops/sec ±0.41% (97 runs sampled)
+source-map-0.8.0: encoded originalPositionFor x 22,272,990 ops/sec ±0.58% (95 runs sampled)
+Fastest is trace-mapping:    decoded originalPositionFor
 ```
 
 [source-map]: https://www.npmjs.com/package/source-map
diff --git a/benchmark/index.mjs b/benchmark/index.mjs
index 3ed9aae..1286d14 100644
--- a/benchmark/index.mjs
+++ b/benchmark/index.mjs
@@ -12,6 +12,8 @@ import { SourceMapConsumer as SourceMapConsumerWasm } from 'source-map-wasm';
 
 const dir = relative(process.cwd(), dirname(fileURLToPath(import.meta.url)));
 
+console.log(`node ${process.version}\n`);
+
 async function bench(file) {
   const map = JSON.parse(readFileSync(join(dir, file)));
   const encodedMapData = map;
@@ -39,7 +41,7 @@ async function bench(file) {
       new SourceMapConsumer061(encodedMapData).originalPositionFor({ line: 1, column: 0 });
     })
     // WASM isn't tested because its async and OOMs.
-    // .add('source-map-0.7.3: encoded Object input', () => { })
+    // .add('source-map-0.8.0: encoded Object input', () => { })
 
     // add listeners
     .on('error', ({ error }) => console.error(error))
@@ -94,7 +96,7 @@ async function bench(file) {
       const column = line[j][0];
       smc061.originalPositionFor({ line: i + 1, column });
     })
-    .add('source-map-0.7.3: encoded originalPositionFor', () => {
+    .add('source-map-0.8.0: encoded originalPositionFor', () => {
       const i = Math.floor(Math.random() * lines.length);
       const line = lines[i];
       if (line.length === 0) return;
diff --git a/benchmark/package-lock.json b/benchmark/package-lock.json
index 1ff0877..9fcd986 100644
--- a/benchmark/package-lock.json
+++ b/benchmark/package-lock.json
@@ -8,7 +8,22 @@
       "devDependencies": {
         "source-map": "0.6.1",
         "source-map-js": "1.0.2",
-        "source-map-wasm": "npm:source-map@0.7.3"
+        "source-map-wasm": "npm:source-map@0.8.0-beta.0"
+      }
+    },
+    "node_modules/lodash.sortby": {
+      "version": "4.7.0",
+      "resolved": "https://registry.npmjs.org/lodash.sortby/-/lodash.sortby-4.7.0.tgz",
+      "integrity": "sha1-7dFMgk4sycHgsKG0K7UhBRakJDg=",
+      "dev": true
+    },
+    "node_modules/punycode": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+      "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
       }
     },
     "node_modules/source-map": {
@@ -31,16 +46,57 @@
     },
     "node_modules/source-map-wasm": {
       "name": "source-map",
-      "version": "0.7.3",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.7.3.tgz",
-      "integrity": "sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ==",
+      "version": "0.8.0-beta.0",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.8.0-beta.0.tgz",
+      "integrity": "sha512-2ymg6oRBpebeZi9UUNsgQ89bhx01TcTkmNTGnNO88imTmbSgy4nfujrgVEFKWpMTEGA11EDkTt7mqObTPdigIA==",
       "dev": true,
+      "dependencies": {
+        "whatwg-url": "^7.0.0"
+      },
       "engines": {
         "node": ">= 8"
       }
+    },
+    "node_modules/tr46": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-1.0.1.tgz",
+      "integrity": "sha1-qLE/1r/SSJUZZ0zN5VujaTtwbQk=",
+      "dev": true,
+      "dependencies": {
+        "punycode": "^2.1.0"
+      }
+    },
+    "node_modules/webidl-conversions": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
+      "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==",
+      "dev": true
+    },
+    "node_modules/whatwg-url": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-7.1.0.tgz",
+      "integrity": "sha512-WUu7Rg1DroM7oQvGWfOiAK21n74Gg+T4elXEQYkOhtyLeWiJFoOGLXPKI/9gzIie9CtwVLm8wtw6YJdKyxSjeg==",
+      "dev": true,
+      "dependencies": {
+        "lodash.sortby": "^4.7.0",
+        "tr46": "^1.0.1",
+        "webidl-conversions": "^4.0.2"
+      }
     }
   },
   "dependencies": {
+    "lodash.sortby": {
+      "version": "4.7.0",
+      "resolved": "https://registry.npmjs.org/lodash.sortby/-/lodash.sortby-4.7.0.tgz",
+      "integrity": "sha1-7dFMgk4sycHgsKG0K7UhBRakJDg=",
+      "dev": true
+    },
+    "punycode": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+      "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
+      "dev": true
+    },
     "source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -54,10 +110,39 @@
       "dev": true
     },
     "source-map-wasm": {
-      "version": "npm:source-map@0.7.3",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.7.3.tgz",
-      "integrity": "sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ==",
+      "version": "npm:source-map@0.8.0-beta.0",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.8.0-beta.0.tgz",
+      "integrity": "sha512-2ymg6oRBpebeZi9UUNsgQ89bhx01TcTkmNTGnNO88imTmbSgy4nfujrgVEFKWpMTEGA11EDkTt7mqObTPdigIA==",
+      "dev": true,
+      "requires": {
+        "whatwg-url": "^7.0.0"
+      }
+    },
+    "tr46": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-1.0.1.tgz",
+      "integrity": "sha1-qLE/1r/SSJUZZ0zN5VujaTtwbQk=",
+      "dev": true,
+      "requires": {
+        "punycode": "^2.1.0"
+      }
+    },
+    "webidl-conversions": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
+      "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==",
       "dev": true
+    },
+    "whatwg-url": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-7.1.0.tgz",
+      "integrity": "sha512-WUu7Rg1DroM7oQvGWfOiAK21n74Gg+T4elXEQYkOhtyLeWiJFoOGLXPKI/9gzIie9CtwVLm8wtw6YJdKyxSjeg==",
+      "dev": true,
+      "requires": {
+        "lodash.sortby": "^4.7.0",
+        "tr46": "^1.0.1",
+        "webidl-conversions": "^4.0.2"
+      }
     }
   }
 }
diff --git a/benchmark/package.json b/benchmark/package.json
index cc450d0..59a9ce8 100644
--- a/benchmark/package.json
+++ b/benchmark/package.json
@@ -3,6 +3,6 @@
   "devDependencies": {
     "source-map": "0.6.1",
     "source-map-js": "1.0.2",
-    "source-map-wasm": "npm:source-map@0.7.3"
+    "source-map-wasm": "npm:source-map@0.8.0-beta.0"
   }
 }