From: Eric Wong <normalperson@...>
Date: 2013-12-01T10:06:55+00:00
Subject: [ruby-core:58733] Re: [ruby-trunk - misc #9188] r43870 make benchmark/bm_so_k_nucleotide.rb slow

Unfortunately, r43870 is a trade-off and optimized for frequently-reused
keys.

How about only using rb_fstring for string literal hash keys?