Update qulinxao.c

tuning nxt()
gcov
update
update
Merge pull request #4 from Qulinxao/patch-1

Update qulinxao.c
Merge pull request #5 from qnikst/master

Add long test.
remove left overs
fix var shadow
all the same
static
mtrace
remove unused
add some sort of isolation
-ggdb
add nice chart
more description
Add more test

update implementation
Improve solution.

1. Code style fixes.
2. Drop GNU includes.
3. Rewrite loop for better performance.