bug#18522: 24.4.50; mapcar is very slow

[Peter Münster]

On Fri, Feb 26 2016, Eli Zaretskii wrote:

>> But I think, that we have found another issue (just a very tiny one):
>> the number of killed buffers, that are not GCed, keeps growing.
>
> Indeed.  I believe Lars is working on this.

It's not only about Gnus buffers. Here some buffer names from my current
killed-buffer-names list:
"*Completions*" "*Backtrace*" "gnus-util.el" "jl-encrypt.el"
"*Completions*" "*Help*" "*Choices*" "misc" "quittance-greenever.tex"
"*~/ctx/misc/quittance-greenever output*" "*Choices*" "custom.el"

-- 
           Peter