I didn't downvote you (I'm just reading this thread for the first time), but I don't get your original argument. Usually benchmarking two languages means either:
* microbenchmarks comparing speed of doing stupid things (like adding 10000 integers or sorting a list with bubblesort 1000 times)
* 'real world'-ish benchmarks comparing idiomatic solutions in two languages doing the same thing
In both cases it doesn't matter (much) how big a standard library is. If you want to compare two languages doing something complex, you need to have -standard or not- implementation of that something for both languages.
But maybe I (and possibly others) have missed your point?
* microbenchmarks comparing speed of doing stupid things (like adding 10000 integers or sorting a list with bubblesort 1000 times)
* 'real world'-ish benchmarks comparing idiomatic solutions in two languages doing the same thing
In both cases it doesn't matter (much) how big a standard library is. If you want to compare two languages doing something complex, you need to have -standard or not- implementation of that something for both languages.
But maybe I (and possibly others) have missed your point?