25 karma · joined April 28, 2017
Years of best practices in product/engineering in blogs (DevOps, I also remember their endless scrolling A/B tests!), youtube, conferences, then product doesn't work, company fires people.
1. Those who are good developers 2. Those who can't write any real code (cargo cult or cut&paste developers, e.g. the 25% who I didn't hire over the years because they were not able to FizzBuzz)(25%-50% of the market)
The 10x comes from comparing (1) and (2) - although dividing anything by 0 is larger than 10x.
1. IO is not as important as your gut feeling tells you (e.g. 5x faster IO often led to <2x faster compiles)
2. Programming languages tout the parallelism horn, but their compilers and tools are really not optimized for many cores.