After reading about using online ads to launch a javascript based DDoS attack I started wondering about how well such a system would do at mining bitcoins. These are my rough calculations. From my research I’ve found there are 3 ways to mine bitcoins(compute hashes) using Javascript: UI thread (I was seeing about 800 hashes/s) Multiple threads via WebWorkers (I was seeing about 13000 hashes/s) Using the GPU via WebGL (limited browser support couldn’t find working example).
