As someone who contributed to this benchmark it really isn't a great one. First of the JSON parsing is done before the timer starts. If you look at the raw results you can see that the full runtime of the Julia solution for 60k posts is actually 9.6 seconds (compared to 3.7, 3.8, 4.4, and 7.9 seconds for Rust, Go, Zig, and Nim respectively). The only thing it really measures is hashing and hash table performance (with a sprinkling of GC and memory management). And of course with any benchmark like this how much dev time each respective language put into the benchmark.