Signal NotesFIELD JOURNAL / 01
Small notes.
Precise systems.
Observations from the quiet parts of engineering: connections, clocks and the assumptions between them.
The notebook
Three starting pointsMEASUREMENT · 4 MIN
There is more than one kind of delay.
A useful timing starts with a clear boundary. A ping and a finished page do not measure the same thing.
TRANSPORT · 3 MIN
A connection is not a page.
What changes when a request reuses a connection — and what does not.
OPERATIONS · 3 MIN
Reading a DNS lifetime.
A record update is one event. The end of caching is a different one.
A clean measurement does not make a system simple. It makes the next question better.