> However, based on the website and sample chapters, it’s not clear that there will be strong arguments made here about either scalability or performance I've

> However, based on the website and sample chapters, it’s not clear that there will be strong arguments made here about either scalability or performance I've read most of it, performance is addressed after correctness. The trick is that your correct API never has to change to get better performance. I don't want to give too much away though and I highly recommend this book.