for a %poke from ~comet-a to ~comet-b of a plea of the following format, using the %chum namespace:

    :*  vane=%g
        path=/ge/hood
        payload=[%0 %m %helm-hi `*`(crip "{(reap i.iters 'a')}")]
    ==

the range that make a one fragment %data payload in a %poke to go over the MTU of (1.470 bytes) is from

[886-1.024] -> packet size: [1.473-1.611]

comet-threshold: 886

range of 'a's in the |hi payload [853-991]

(note: we also get the same results by just payload=[%0 %m %helm-hi (gulf 0 ...)]

beyond that the message turns into a multi-fragment packet, and the first fragment becomes an %auth payload

• ~comet to ~moon / ~moon to ~comet presents the same problem:

[978-1.023] -> packet size: [1.473-1.518]

for this we also use the same comet-threshold: 886

• ~moon to ~moon and doesn't seem to go over the MTU, for normal paths