what's best Charset to make 4.3 faster but still ....

[Ashur]

ok right now totally using UTF8_unicode_ci but here is my question!!
is it better to use above, UTF8_general_ci, UTF8_bin, UTF8_persian_ci or cp1256_genearl_ci, cp1256_bin
or even something else????

I want to use less CPU but still supporting Arabic language which is demanded by the users otherwise i wouldn't bother and stayed with default which was latin1_swedish_ci and it was working perfectly fine for me in English but then users get what users want

I appreciate any real technical feedback