[bfeynman]

Setting aside the egotistical link to misused philosophical point (I specifically did not say no one cares about it, nor did I assert I've never seen someone who does care about it), the major bottleneck for most software has always been dependency resolution and build time (which might include running tests).

HN has been chock full of blogs for years from big and small firms that talk about how they sped up the build process. Updating hardware, compilers, architecture refactoring etc, compilers and adding optimization flags could affect the run time of a test, outside of one that literally has some `sleep(...)` call in it, in which case this report is also fairly useless.