[azhenley]

This is awesome! More good press for Nim.

There is a big variation in performance, some of which I find surprising. Do you know what exactly causes some languages to be so slow (e.g., small objects being created and garbage collected frequently)?

[niofis]

Did some testing and found that it boils down to three things: RNG algorithm used in the standard library, forced use of double precision floating point numbers (the case for OCaml and javascript), and like you mentioned, memory management.

EDIT: forgot to mention the obvious things: compiler/interpreter maturity and inherent overhead.