Add a benchmark for loading a db

benchmarks/benchmark-load.js

@@ -0,0 +1,54 @@
+'use strict'
+
+const IPFS = require('ipfs')
+const IPFSRepo = require('ipfs-repo')
+const DatastoreLevel = require('datastore-level')
+const OrbitDB = require('../src/OrbitDB')
+
+console.log("Starting IPFS...")
+
+const repoConf = {
+  storageBackends: {
+    blocks: DatastoreLevel
+  }
+}
+
+const ipfs = new IPFS({
+  repo: new IPFSRepo('./orbitdb/benchmarks/load/ipfs', repoConf),
+  start: false
+})
+
+ipfs.on('error', (err) => console.error(err))
+
+ipfs.on('ready', async () => {
+  const run = async () => {
+    try {
+      const orbit = await OrbitDB.createInstance(ipfs, { directory: './orbitdb/benchmarks' })
+      const db = await orbit.eventlog('orbit-db.benchmark', { replicate: false })
+
+      const amount = 1000
+      console.log('DB entries:', amount)
+
+      console.log('Writing DB...')
+      const st1 = new Date().getTime()
+      for (let i = 0; i < amount; i++) {
+        await db.add('a' + i, 64)
+      }
+      const et1 = new Date().getTime()
+      console.log('writing took', (et1 - st1), 'ms')
+      await db.close()
+
+      const db2 = await orbit.eventlog('orbit-db.benchmark', { replicate: false })
+      console.log('Loading DB...')
+      const st2 = new Date().getTime()
+      await db2.load()
+      const et2 = new Date().getTime()
+      console.log('load took', (et2 - st2), 'ms')
+      process.exit(0)
+    } catch (e) {
+      console.log(e)
+      process.exit(1)
+    }
+  }
+  run()
+})