bug#35321: [PATCH] * src/bytecode.c (exec_byte_code) Unroll Blist3 and Blist4

[Eli Zaretskii]

> From: Alex Gramiak <agrambot@gmail.com>
> Cc: 35321@debbugs.gnu.org
> Date: Fri, 19 Apr 2019 14:30:03 -0600
> 
> > Does this produce any tangible performance gains?
> 
> It seems to be within error. I was just in the byte compiler recently
> and saw that Blist3/4 don't use list3/4 like Blist2 uses list2. If
> you're worried about touching older code for little gain, then I guess
> it's safer to leave it alone.

Is there any reason other than performance to make the change?

Also, are Blist3/4 used frequently enough to justify the change?