Running base64-js benchmarks on Node.js v8.1.2 vs v8.2.0-rc.1
$ node --version
v8.1.2
$ node bench/basic.js
decode ms, decode ops/ms, encode ms, encode ops/ms
8 166667 37 36036.10810810811
$ nvm use rc
Now using node v8.2.0-rc.1 (npm v5.0.3)
$ node bench/basic.js
decode ms, decode ops/ms, encode ms, encode ops/ms
22 60606.181818181816 44 30303.090909090908
I'm consistently getting around 8ms to decode in v8.1.2 and 22ms in v8.2.0-rc.1 with bench/basic.js