chore: add basic benchmark script (#3)

`npm run bench` will create a million projects and tell you how long it
takes.

bench/bench.js

@@ -0,0 +1,30 @@
+// @ts-check
+
+import bench from 'nanobench'
+import assert from 'node:assert/strict'
+import { setup } from '../tests/helpers.js'
+
+const GET_PROJECT_COUNT = 1_000_000
+
+bench(`fetching ${GET_PROJECT_COUNT} projects`, async (b) => {
+  const { client, cleanup } = setup()
+
+  const projectId = await client.createProject()
+
+  b.start()
+
+  const projects = await Promise.all(
+    new Array(GET_PROJECT_COUNT)
+      .fill(null)
+      .map(() => client.getProject(projectId)),
+  )
+
+  b.end()
+
+  await cleanup()
+
+  const [firstProject] = projects
+  projects.forEach((project) => {
+    assert.equal(project, firstProject)
+  })
+})

package.json

@@ -11,6 +11,7 @@
     "types": "tsc -p tsconfig.json",
     "test:unit": "node --test tests/*.js",
     "test": "npm-run-all lint types test:unit",
+    "bench": "node bench/bench.js",
     "build": "tsc -p tsconfig.npm.json",
     "prepack": "npm run build",
     "prepare": "husky install",
@@ -46,10 +47,12 @@
   "devDependencies": {
     "@digidem/types": "^2.1.0",
     "@mapeo/crypto": "^1.0.0-alpha.8",
+    "@types/nanobench": "^3.0.0",
     "@types/node": "^20.7.1",
     "eslint": "^8.50.0",
     "husky": "^8.0.0",
     "lint-staged": "^14.0.1",
+    "nanobench": "^3.0.0",
     "npm-run-all": "^4.1.5",
     "prettier": "^3.0.3",
     "random-access-memory": "^6.2.0",

tests/basic.js

@@ -1,27 +1,9 @@
 import test from 'node:test'
 import assert from 'node:assert/strict'
-import { MessageChannel } from 'node:worker_threads'
-import RAM from 'random-access-memory'
-import { KeyManager } from '@mapeo/crypto'
-import { MapeoManager } from '@mapeo/core'
-import { createRequire } from 'node:module'
-import path from 'node:path'
-
-import { createMapeoClient, closeMapeoClient } from '../src/client.js'
-import { createMapeoServer } from '../src/server.js'
-
-const require = createRequire(import.meta.url)
-const MAPEO_CORE_PKG_FOLDER = path.dirname(
-  require.resolve('@mapeo/core/package.json'),
-)
-const projectMigrationsFolder = path.join(
-  MAPEO_CORE_PKG_FOLDER,
-  'drizzle/project',
-)
-const clientMigrationsFolder = path.join(
-  MAPEO_CORE_PKG_FOLDER,
-  'drizzle/client',
-)
+
+import { closeMapeoClient } from '../src/client.js'
+
+import { setup } from './helpers.js'
 
 test('IPC wrappers work', async () => {
   const { client, cleanup } = setup()
@@ -154,37 +136,3 @@ test('Client calls fail after server closes', async () => {
 
   return cleanup()
 })
-
-function setup() {
-  const { port1, port2 } = new MessageChannel()
-
-  const manager = new MapeoManager({
-    rootKey: KeyManager.generateRootKey(),
-    dbFolder: ':memory:',
-    coreStorage: () => new RAM(),
-    projectMigrationsFolder,
-    clientMigrationsFolder,
-  })
-
-  // Since v14.7.0, Node's MessagePort extends EventTarget (https://nodejs.org/api/worker_threads.html#class-messageport)
-  // @ts-expect-error
-  const server = createMapeoServer(manager, port1)
-  // @ts-expect-error
-  const client = createMapeoClient(port2)
-
-  port1.start()
-  port2.start()
-
-  return {
-    port1,
-    port2,
-    server,
-    client,
-    cleanup: async () => {
-      server.close()
-      await closeMapeoClient(client)
-      port1.close()
-      port2.close()
-    },
-  }
-}

tests/helpers.js

@@ -0,0 +1,57 @@
+import { MessageChannel } from 'node:worker_threads'
+import RAM from 'random-access-memory'
+import { KeyManager } from '@mapeo/crypto'
+import { MapeoManager } from '@mapeo/core'
+import { createRequire } from 'node:module'
+import path from 'node:path'
+
+import { createMapeoClient, closeMapeoClient } from '../src/client.js'
+import { createMapeoServer } from '../src/server.js'
+
+const require = createRequire(import.meta.url)
+
+const MAPEO_CORE_PKG_FOLDER = path.dirname(
+  require.resolve('@mapeo/core/package.json'),
+)
+const projectMigrationsFolder = path.join(
+  MAPEO_CORE_PKG_FOLDER,
+  'drizzle/project',
+)
+const clientMigrationsFolder = path.join(
+  MAPEO_CORE_PKG_FOLDER,
+  'drizzle/client',
+)
+
+export function setup() {
+  const { port1, port2 } = new MessageChannel()
+
+  const manager = new MapeoManager({
+    rootKey: KeyManager.generateRootKey(),
+    dbFolder: ':memory:',
+    coreStorage: () => new RAM(),
+    projectMigrationsFolder,
+    clientMigrationsFolder,
+  })
+
+  // Since v14.7.0, Node's MessagePort extends EventTarget (https://nodejs.org/api/worker_threads.html#class-messageport)
+  // @ts-expect-error
+  const server = createMapeoServer(manager, port1)
+  // @ts-expect-error
+  const client = createMapeoClient(port2)
+
+  port1.start()
+  port2.start()
+
+  return {
+    port1,
+    port2,
+    server,
+    client,
+    cleanup: async () => {
+      server.close()
+      await closeMapeoClient(client)
+      port1.close()
+      port2.close()
+    },
+  }
+}