Hello,
I am an author of some more lightweight benchmark WebFrameworkBenchmark, it is much simpler but also more friendly benchmark than Techempower's Benchmark.
I wanted to ask you to have a look at my Vibe.d results, which are pretty disappointing, just below Ruby performance and far below C and Java frameworks. Vibe.d looks really nice, it has interesting features, but its performance really needs some love (aka optimizations).