dev: add wasm bench

src/emulator/benchmark/bench.wat

@@ -0,0 +1,10 @@
+(module
+  (func $benchmark (export "benchmark")
+    (local $i i32)
+    (loop $loop
+      (local.set $i (i32.add (local.get $i) (i32.const 1)))
+      (i32.eq (local.get $i) (i32.const 10000))
+      br_if $loop
+    )
+  )
+)

src/emulator/package.json

@@ -14,6 +14,7 @@
     "html-webpack-plugin": "^5.6.0"
   },
   "dependencies": {
-    "brotli-dec-wasm": "^2.3.0"
+    "brotli-dec-wasm": "^2.3.0",
+    "copy-webpack-plugin": "^12.0.2"
   }
 }

src/emulator/src/main.js

@@ -114,8 +114,34 @@ puter.ui.on('connection', event => {
     conn.on('message', pty_on_first_message);
 });
 
+const bench = async ({ modules }) => {
+    const { benchmark } = modules.bench;
+    const ts_start = performance.now();
+    benchmark();
+    const ts_end = performance.now();
+    // console.log('benchmark took', ts_end - ts_start);
+    return ts_end - ts_start;
+}
+
+const bench_20ms = async (ctx) => {
+    let ts = 0, count = 0;
+    for (;;) {
+        ts += await bench(ctx);
+        count++;
+        if ( ts > 20 ) {
+            return count;
+        }
+    }
+}
+
 window.onload = async function()
 {
+    const modules = {};
+    modules.bench = (await WebAssembly.instantiateStreaming(
+        fetch('./static/bench.wasm'))).instance.exports;
+
+    const res = await bench_20ms({ modules });
+    console.log('result', res);
     let emu_config; try {
         emu_config = await puter.fs.read('config.json');
     } catch (e) {}

src/emulator/webpack.config.js

@@ -1,5 +1,6 @@
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 const DefinePlugin = require('webpack').DefinePlugin;
+const CopyPlugin = require('copy-webpack-plugin');
 
 module.exports = {
     entry: [
@@ -12,5 +13,10 @@ module.exports = {
         new DefinePlugin({
             MODE: JSON.stringify(process.env.MODE ?? 'dev')
         }),
+        new CopyPlugin({
+            patterns: [
+                { from: 'benchmark', to: 'static' }
+            ]
+        })
     ]
 };