Most tests opened a throwaway panel DB with database.InitDB, which runs the
full AutoMigrate + seed on an empty file every time: ~230ms, and ~850ms under
-race because GORM's reflection-heavy migration is what the detector slows
most. internal/web/service does this in ~550 of its 830 tests, so the CI race
job spent ~10 of its ~14.6 minutes re-migrating empty databases.
internal/database/dbtest.InitDB migrates once per test process, then hands
each test its own copy of that file (~130ms under -race) and registers the
CloseDB cleanup. The copy then goes through InitDB like a panel restart, so
every test still starts from the state a fresh install has. Tests that reopen
an existing file, migrate a hand-built legacy DB or target Postgres keep
calling database.InitDB.
Locally under -race: internal/web/service 626s (last CI run) -> 114s,
internal/sub 246s -> 35s.
A master-side network blip flips every node in one heartbeat tick, and
each node published its own node.down, then node.up. A notifier queue holds
64 events and the rate limiter keys on the node name, so with 150 nodes most
alerts were dropped and the rest ran into Telegram and Discord limits.
Past five same-direction transitions in one tick the heartbeat publishes a
single event per direction naming the nodes (the first ten, sorted, then
+N). Smaller ticks keep per-node events with their health data, and the
notifiers already read the node name from Source, so no formatter changed.
MHSanaei