ping time increases over time

[piersoh]

I've been trying to use the hs.network.ping function to do periodic pings but strangely the reported ping times seem to slowly increase (over an hour it increases by about 3-4ms) as compared to running the ping command from a terminal window?

Here's an example:

local function handlePing(obj, msg, ...)
     if msg == "didFinish" then
         print(obj:summary())
     end 
end

local function runPingTest()
        local p = hs.network.ping('1.1.1.1', 4, 1.0, 1.5, handlePing)
end

pingtesttimer = hs.timer.doEvery(5, runPingTest)

This is with Hammerspoon: 0.9.97 (6267) on MacOS 11.6.7