MTR client connections on Windows became much slower

--let $trial = 100

while ($trial)

{

  --connect (con1,localhost,root,,)

  --disconnect con1

  --dec $trial

}

--echo # All done

On 10.0 commit aad8667f8a4e2a26652494b29ee6c12824865ac8 the test goes almost instantly:

Spent 0.126 of 13 seconds executing testcases

On 10.0 commit a453a280403faef3377db0441560c57b4ae1235b it takes much much longer:

Spent 100.209 of 118 seconds executing testcases

Also, the complete test run on win64-release2 seems to take twice as much as it used to, ~3:30 vs 1:40.