add some benchmarking against proj4.js

examples/js/benchmark.ts

@@ -0,0 +1,50 @@
+import Benchmark from 'benchmark';
+const suite = new Benchmark.Suite();
+
+import {Geodesy} from '../../pkg/node/index';
+import proj4 from 'proj4';
+
+const EPSG_27700 =
+  '+inv +proj=tmerc +lat_0=49 +lon_0=-2 +k_0=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy';
+const stdPipelineDefinition = `
+    +proj=pipeline
+      +step ${EPSG_27700}
+      +step +proj=webmerc +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84
+    `;
+
+const proj = proj4(EPSG_27700, 'EPSG:3857');
+const geodesy = new Geodesy(stdPipelineDefinition);
+
+const coords: number[][] = [];
+
+const bounds = {
+  min: {x: -103976.3, y: -16703.87},
+  max: {x: 652897.98, y: 1199851.44},
+};
+
+for (let i = 0; i < 1_000_000; i++) {
+  const x = Math.random() * (bounds.max.x - bounds.min.x) + bounds.min.x;
+  const y = Math.random() * (bounds.max.y - bounds.min.y) + bounds.min.y;
+
+  coords.push([x, y]);
+}
+
+suite
+  .add('Proj4.js', () => {
+    const processed = coords.map(c => proj.forward(c));
+  })
+  .add('GeodesyWasm', () => {
+    const processedGeodesy = geodesy.forward(coords);
+  })
+  .on('cycle', (event: any) => {
+    const benchmark = event.target;
+
+    console.log(benchmark.toString());
+  })
+  .on('complete', (event: any) => {
+    const suite = event.currentTarget;
+    const fastestOption = suite.filter('fastest').map('name');
+
+    console.log(`The fastest option is ${fastestOption}`);
+  })
+  .run();

package.json

@@ -15,9 +15,11 @@
     "eslint": "^8.46.0",
     "eslint-config-prettier": "^9.0.0",
     "prettier": "^3.0.1",
-    "typescript": "^5.1.6"
-  },
-  "dependencies": {
-    "commander": "^11.0.0"
+    "typescript": "^5.1.6",
+    "@types/benchmark": "^2.1.3",
+    "@types/proj4": "^2.5.2",
+    "benchmark": "^2.1.4",
+    "commander": "^11.0.0",
+    "proj4": "^2.9.0"
   }
 }