chore: add ssr benchmark suite (#14361)

* chore: add ssr benchmark suite

* lint

* Update benchmarking/run.js

Co-authored-by: Rich Harris <rich.harris@vercel.com>

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>

benchmarking/.gitignore

@@ -0,0 +1 @@
+output

benchmarking/benchmarks/reactivity/index.js

@@ -1,15 +1,12 @@
-import {
-	kairo_avoidable_owned,
-	kairo_avoidable_unowned
-} from './benchmarks/kairo/kairo_avoidable.js';
-import { kairo_broad_owned, kairo_broad_unowned } from './benchmarks/kairo/kairo_broad.js';
-import { kairo_deep_owned, kairo_deep_unowned } from './benchmarks/kairo/kairo_deep.js';
-import { kairo_diamond_owned, kairo_diamond_unowned } from './benchmarks/kairo/kairo_diamond.js';
-import { kairo_mux_unowned, kairo_mux_owned } from './benchmarks/kairo/kairo_mux.js';
-import { kairo_repeated_unowned, kairo_repeated_owned } from './benchmarks/kairo/kairo_repeated.js';
-import { kairo_triangle_owned, kairo_triangle_unowned } from './benchmarks/kairo/kairo_triangle.js';
-import { kairo_unstable_owned, kairo_unstable_unowned } from './benchmarks/kairo/kairo_unstable.js';
-import { mol_bench_owned, mol_bench_unowned } from './benchmarks/mol_bench.js';
+import { kairo_avoidable_owned, kairo_avoidable_unowned } from './kairo/kairo_avoidable.js';
+import { kairo_broad_owned, kairo_broad_unowned } from './kairo/kairo_broad.js';
+import { kairo_deep_owned, kairo_deep_unowned } from './kairo/kairo_deep.js';
+import { kairo_diamond_owned, kairo_diamond_unowned } from './kairo/kairo_diamond.js';
+import { kairo_mux_unowned, kairo_mux_owned } from './kairo/kairo_mux.js';
+import { kairo_repeated_unowned, kairo_repeated_owned } from './kairo/kairo_repeated.js';
+import { kairo_triangle_owned, kairo_triangle_unowned } from './kairo/kairo_triangle.js';
+import { kairo_unstable_owned, kairo_unstable_unowned } from './kairo/kairo_unstable.js';
+import { mol_bench_owned, mol_bench_unowned } from './mol_bench.js';
 import {
 	sbench_create_0to1,
 	sbench_create_1000to1,
@@ -21,12 +18,12 @@ import {
 	sbench_create_2to1,
 	sbench_create_4to1,
 	sbench_create_signals
-} from './benchmarks/sbench.js';
+} from './sbench.js';
 
 // This benchmark has been adapted from the js-reactivity-benchmark (https://github.com/milomg/js-reactivity-benchmark)
 // Not all tests are the same, and many parts have been tweaked to capture different data.
 
-export const benchmarks = [
+export const reactivity_benchmarks = [
 	sbench_create_signals,
 	sbench_create_0to1,
 	sbench_create_1to1,

benchmarking/benchmarks/reactivity/kairo/kairo_avoidable.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../../utils.js';
-import * as $ from '../../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../../utils.js';
+import * as $ from 'svelte/internal/client';
 import { busy } from './util.js';
 
 function setup() {

benchmarking/benchmarks/reactivity/kairo/kairo_broad.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../../utils.js';
-import * as $ from '../../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../../utils.js';
+import * as $ from 'svelte/internal/client';
 
 function setup() {
 	let head = $.state(0);

benchmarking/benchmarks/reactivity/kairo/kairo_deep.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../../utils.js';
-import * as $ from '../../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../../utils.js';
+import * as $ from 'svelte/internal/client';
 
 let len = 50;
 const iter = 50;

benchmarking/benchmarks/reactivity/kairo/kairo_diamond.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../../utils.js';
-import * as $ from '../../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../../utils.js';
+import * as $ from 'svelte/internal/client';
 
 let width = 5;
 

benchmarking/benchmarks/reactivity/kairo/kairo_mux.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../../utils.js';
-import * as $ from '../../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../../utils.js';
+import * as $ from 'svelte/internal/client';
 
 function setup() {
 	let heads = new Array(100).fill(null).map((_) => $.state(0));

benchmarking/benchmarks/reactivity/kairo/kairo_repeated.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../../utils.js';
-import * as $ from '../../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../../utils.js';
+import * as $ from 'svelte/internal/client';
 
 let size = 30;
 

benchmarking/benchmarks/reactivity/kairo/kairo_triangle.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../../utils.js';
-import * as $ from '../../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../../utils.js';
+import * as $ from 'svelte/internal/client';
 
 let width = 10;
 

benchmarking/benchmarks/reactivity/kairo/kairo_unstable.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../../utils.js';
-import * as $ from '../../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../../utils.js';
+import * as $ from 'svelte/internal/client';
 
 function setup() {
 	let head = $.state(0);

benchmarking/benchmarks/reactivity/mol_bench.js

@@ -1,5 +1,5 @@
-import { assert, fastest_test } from '../utils.js';
-import * as $ from '../../packages/svelte/src/internal/client/index.js';
+import { assert, fastest_test } from '../../utils.js';
+import * as $ from 'svelte/internal/client';
 
 /**
  * @param {number} n

benchmarking/benchmarks/reactivity/sbench.js

@@ -1,5 +1,5 @@
-import { fastest_test } from '../utils.js';
-import * as $ from '../../packages/svelte/src/internal/client/index.js';
+import { fastest_test } from '../../utils.js';
+import * as $ from '../../../packages/svelte/src/internal/client/index.js';
 
 const COUNT = 1e5;
 

benchmarking/benchmarks/ssr/index.js

@@ -0,0 +1,3 @@
+import { wrapper_bench } from './wrapper/wrapper_bench.js';
+
+export const ssr_benchmarks = [wrapper_bench];

benchmarking/benchmarks/ssr/wrapper/App.svelte

@@ -0,0 +1,31 @@
+<script>
+	const wrapperWidth = 960;
+	const wrapperHeight = 720;
+	const cellSize = 10;
+	const centerX = wrapperWidth / 2;
+	const centerY = wrapperHeight / 2;
+
+	let angle = 0;
+	let radius = 0;
+
+	let tiles = [];
+	const step = cellSize;
+
+	while (radius < Math.min(wrapperWidth, wrapperHeight) / 2) {
+		let x = centerX + Math.cos(angle) * radius;
+		let y = centerY + Math.sin(angle) * radius;
+
+		if (x >= 0 && x <= wrapperWidth - cellSize && y >= 0 && y <= wrapperHeight - cellSize) {
+			tiles.push({ x, y });
+		}
+
+		angle += 0.2;
+		radius += step * 0.015;
+	}
+</script>
+
+<div id="wrapper">
+	{#each tiles as { x, y }}
+		<div class="tile" style="left: {x.toFixed(2)}px; top: {y.toFixed(2)}px;"></div>
+	{/each}
+</div>

benchmarking/benchmarks/ssr/wrapper/wrapper_bench.js

@@ -0,0 +1,36 @@
+import { render } from 'svelte/server';
+import { fastest_test, read_file, write } from '../../../utils.js';
+import { compile } from 'svelte/compiler';
+
+const dir = `${process.cwd()}/benchmarking/benchmarks/ssr/wrapper`;
+
+async function compile_svelte() {
+	const output = compile(read_file(`${dir}/App.svelte`), {
+		generate: 'server'
+	});
+	write(`${dir}/output/App.js`, output.js.code);
+
+	const module = await import(`${dir}/output/App.js`);
+
+	return module.default;
+}
+
+export async function wrapper_bench() {
+	const App = await compile_svelte();
+	// Do 3 loops to warm up JIT
+	for (let i = 0; i < 3; i++) {
+		render(App);
+	}
+
+	const { timing } = await fastest_test(10, () => {
+		for (let i = 0; i < 100; i++) {
+			render(App);
+		}
+	});
+
+	return {
+		benchmark: 'wrapper_bench',
+		time: timing.time.toFixed(2),
+		gc_time: timing.gc_time.toFixed(2)
+	};
+}

benchmarking/run.js

@@ -1,30 +1,53 @@
 import * as $ from '../packages/svelte/src/internal/client/index.js';
-import { benchmarks } from './benchmarks.js';
+import { reactivity_benchmarks } from './benchmarks/reactivity/index.js';
+import { ssr_benchmarks } from './benchmarks/ssr/index.js';
 
 let total_time = 0;
 let total_gc_time = 0;
 
+const suites = [
+	{ benchmarks: reactivity_benchmarks, name: 'reactivity benchmarks' },
+	{ benchmarks: ssr_benchmarks, name: 'server-side rendering benchmarks' }
+];
+
 // eslint-disable-next-line no-console
-console.log('-- Benchmarking Started --');
+console.log('\x1b[1m', '-- Benchmarking Started --', '\x1b[0m');
 $.push({}, true);
 try {
-	for (const benchmark of benchmarks) {
-		const results = await benchmark();
+	for (const { benchmarks, name } of suites) {
+		let suite_time = 0;
+		let suite_gc_time = 0;
+		// eslint-disable-next-line no-console
+		console.log(`\nRunning ${name}...\n`);
+
+		for (const benchmark of benchmarks) {
+			const results = await benchmark();
+			// eslint-disable-next-line no-console
+			console.log(results);
+			total_time += Number(results.time);
+			total_gc_time += Number(results.gc_time);
+			suite_time += Number(results.time);
+			suite_gc_time += Number(results.gc_time);
+		}
+
+		console.log(`\nFinished ${name}.\n`);
+
 		// eslint-disable-next-line no-console
-		console.log(results);
-		total_time += Number(results.time);
-		total_gc_time += Number(results.gc_time);
+		console.log({
+			suite_time: suite_time.toFixed(2),
+			suite_gc_time: suite_gc_time.toFixed(2)
+		});
 	}
 } catch (e) {
 	// eslint-disable-next-line no-console
-	console.error('-- Benchmarking Failed --');
+	console.log('\x1b[1m', '\n-- Benchmarking Failed --\n', '\x1b[0m');
 	// eslint-disable-next-line no-console
 	console.error(e);
 	process.exit(1);
 }
 $.pop();
 // eslint-disable-next-line no-console
-console.log('-- Benchmarking Complete --');
+console.log('\x1b[1m', '\n-- Benchmarking Complete --\n', '\x1b[0m');
 // eslint-disable-next-line no-console
 console.log({
 	total_time: total_time.toFixed(2),

benchmarking/utils.js

@@ -1,5 +1,7 @@
 import { performance, PerformanceObserver } from 'node:perf_hooks';
 import v8 from 'v8-natives';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
 
 // Credit to https://github.com/milomg/js-reactivity-benchmark for the logic for timing + GC tracking.
 
@@ -96,3 +98,22 @@ export function assert(a) {
 		throw new Error('Assertion failed');
 	}
 }
+
+/**
+ * @param {string} file
+ */
+export function read_file(file) {
+	return fs.readFileSync(file, 'utf-8').replace(/\r\n/g, '\n');
+}
+
+/**
+ * @param {string} file
+ * @param {string} contents
+ */
+export function write(file, contents) {
+	try {
+		fs.mkdirSync(path.dirname(file), { recursive: true });
+	} catch {}
+
+	fs.writeFileSync(file, contents);
+}