PostPointsAsync method is so slow in linux os

[jinkyu93]

hi
I've used this library on my dot net core solution.
when I test in window os, this library was not slow.
but in linux os, PostPointsAsync was so slow.
I checked why. and I find InfluxValueField.ToString is so slow.
if InfluxValueField is double or float, you use String.Format method.
but when I tested in linux os, this code so slow. so I changed this code just toString.
after changing, PostPointsAsync was not slow in linux os.

I have some question. why use String.Format method?

my development environment is
window : window 10
linux : centos 7

check this logic please.

[mvadu]

Please see #3. InfluxDB assumes decimal separator to be a ., but in other locale settings system default could be , which makes the Influx line protocol to break. If the String.Format is slow on linux then we should probably raise in .netcore. If its just in InfluxValueField.ToString I can take a look to optimize it.

[yyjdelete]

May should use CultureInfo.InvariantCulture instead?

[jinkyu93]

How about
"CultureInfo.GetCultureInfo("en-us")"
instead of
"new CultureInfo("en-us")"

when I change this code, I got a fast speed in linux os
you made to create every time CultureInfo object on call ToString in InfluxValueField. that is seem to be inefficient.

[mvadu]

@jinkyu93 that is a brilliant suggestion.. Now wondering why I did not think about it.. I will try to push an update this weekend..