Suggest: local detect problem and solution / Windows timer_start bootup delay fix

[tsuyoshicho]

Currently, I tried GitHub Actions CI flow in PR #701 .

Just now fix in Windows performance base problem (root cause same as #716 I think)
Windows timer_start() delay bootup vs. other system.

In slack via https://vim-jp.slack.com/archives/CLKR04BEF/p1580701871018800

let g:start = reltime() | call timer_start(0, {-> execute("echom reltimestr(reltime(g:start))", "")})
Windows GUI: 6ms
Windows CUI: 0.8ms
WSL GUI: 5ms
WSL CUI: 0.1ms

I've temporarily fix
tsuyoshicho@3ada77e

This fix is correct? , and/or if it is needed importing to vita.vim master?.
(I care if I misunderstand my test intent and destroy it.)

see also
aac5a0c