  Self-testing and Semi-Device Independent protocols are becoming the preferred
choice for quantum technologies, being able to certify their quantum nature
with few assumptions and simple experimental implementations. In particular for
Quantum Random Number Generators the possibility of monitoring in real time the
entropy of the source only by measuring the input/output statistics is a
characteristic that no other classical system could provide. The cost of this
new possibility is not necessarily increased complexity and reduced
performance. Indeed, here we show that with a simple optical setup consisting
of commercially available components, a high bit generation rate can be
achieved. We manage to certify 145.5~MHz of quantum random bit generation rate.
