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> So really, if I rewrote it in C++ using the most blisteringly fast JSON library I could find, it would just mean the program will spend more time blocking on

> So really, if I rewrote it in C++ using the most blisteringly fast JSON library I could find, it would just mean the program will spend more time blocking on gcov's output. Until the day when clang starts outputting gcov at 30x the rate GCC does it, and then fastcov will become the bottleneck. That said, I'm an user and it is much better than lcov so thank you for it :-)

umvi 6y ago
Very true... and let's hope that day does come, because it means we can generate coverage reports even faster (if not with my tool, with someone else's)!
- anitil 6y ago
  Agreed, that sounds like a good problem to have!