Matrix, the world’s fastest file system, was written in D and recently posted impressive numbers in the IO-500 Node Challenge. It was created by WekaIO, a San Jose, CA, based startup with engineering in Tel Aviv, Israel. Liran Zvibel, the co-founder and CEO of WekaIO, has been a regular speaker at DConf, talking about their use of D at DConf 2015, 2016, and 2018.