I have no problem with GC, but I want to see reasonably complicated benchmarks that actually show that it's "fast as C". Because I don't believe that at all.
https://groups.google.com/forum/?fromgroups#!topic/crystal-l...
https://crystal-lang.org/2016/07/15/fibonacci-benchmark.html
I very much doubt that a fib code-snippet is what he was asking about.