mimicking the functionality of iswitchb mode?

[Lucas Radaelli <lucasradaelli@xxxxxxxxxxx>]

I switched to emacs 25 and emacspeak 45. In emacs 25, iswitchb mode is 
deprecated, so i was looking for some other options.

I tried ido mode, helm and ecomplety mode. Both three have a somewhat 
strange functionality.

When using iswitchb mode, when changing buffers, by typing part of the 
name of the buffer, emacspeak would tell me immediately the first select 
option and append in the end  the number of options that I could switch to.


Either with helm or ido mode, when I type, it also says the possible 
options, but it takes a long time to do so.The
 speed of the spoken feedback of the iswichb mode interface was like 
when doing incremental searches in a buffer -- that is, candidates are 
announced right away. With helm or ido mode, however, this update takes 
some time.


Let's say that I have three buffers, a.txt, b.txt and c.txt

When typing:
C-x b txt

I hear:
txt 0 choices
and just after it says:
a.txt one of three.

is there a way to make the behavior of ido or helm to be the same as the 
iswitchb mode, concerning the spoken feedback?