diff --git a/test/bench.js b/test/bench.js
new file mode 100644
index 0000000..444af30
--- /dev/null
+++ b/test/bench.js
@@ -0,0 +1,19 @@
+var random = require('crypto').pseudoRandomBytes
+
+var b64 = require('../')
+var fs = require('fs')
+var path = require('path')
+var data = random(1e6).toString('base64')
+//fs.readFileSync(path.join(__dirname, 'example.b64'), 'ascii').split('\n').join('')
+var start = Date.now()
+var raw = b64.toByteArray(data)
+var middle = Date.now()
+var data = b64.fromByteArray(raw)
+var end = Date.now()
+
+console.log('decode ms, decode ops/ms, encode ms, encode ops/ms')
+console.log(
+  middle - start,  data.length / (middle - start), 
+  end - middle,  data.length / (end - middle))
+//console.log(data)
+