[KaoruAoiShiho]

Gitlab most certainly not included! Its perf is awful in comparison to any modern stack (including some php ones unfortunately).

[yutghgh]

I didn't say GitLab was fast (I haven't used it enough to know), but blaming its problems on ruby/rails when GitHub (which is pretty fast imo) is also written on rails is misleading at best.

[chinhodado]

Ruby/rails is not the only factor, but it is certainly one of the contributing factors, and it is a big one. There's no need to deny that.