Why is chrome layout 2277 ms, edge and firefox 150 ms, local pc 13 ms?

hi
cannot see thread posted seconds ago being in moderation - trying again.

Why is chrome layout 2277 ms, edge and firefox 150 ms, local pc 13 ms?

These are tested on temp sandbox url that will self-destruct in 24 hours.

Problem not server, but massive wpt layout time differences.

https://www.webpagetest.org/result/201118_DiGZ_08f12ec05630d622973ba378b23c48a3/
From: Dulles, VA - Chrome - Cable
start render 4.4 sec ???
massive … Layout 2,277

https://www.webpagetest.org/result/201118_DiSD_f8fa5e01a3c1bb25b3705c4957c486d1/
Microsoft Edge (Chromium)
start render 1.1 sec
Layout 150

https://www.webpagetest.org/result/201118_DiA4_1d2484ed9ca9d2c581111df90b320637/
start render 1,8 sec
no massive purple layout shown - assume it to be ab out 150 ms - same as edge

local pc Chrome lighthouse test::

layout in 13 milliseconds - versus 2277 at first chrome test link above