Justify the handlers tests' start limit with a measurement (closes #225) #432
@@ -181,6 +181,11 @@ func (r *recordingArchives) Renames() []archiveRename {
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return out
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}
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// newTestApp returns an app whose RequireStart fails the test when
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// starting takes longer than fx's default start timeout of 15s. That
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// limit catches a start that hangs, not a busy host: measured with make
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// test on 2026-10-02 at host load 58-69 on 48 cores, the slowest of this
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// package's starts took 0.49s.
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func newTestApp(
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t *testing.T,
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targets ...any,
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+9
-3
@@ -2,9 +2,10 @@
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# script/test: run the test suite.
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#
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# -timeout is applied by `go test` per package, not to the run as a whole, so
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# it only has to clear the slowest single package. That is internal/handlers,
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# measured in a cache-defeated builder stage on the 48-core shared build host
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# (2026-08-18); load- and host-dependent, not invariants:
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# it only has to clear the slowest single package. When this budget was set
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# that was internal/handlers, measured in a cache-defeated builder stage on the
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# 48-core shared build host (2026-08-18); load- and host-dependent, not
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# invariants:
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#
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# 16.9s host load 5-20, GOMAXPROCS 48
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# 45.9s / 47.3s / 49.0s three runs at deliberate host load 31-73
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@@ -23,6 +24,11 @@
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# a condition CI runs under. If a CPU-limited runner ever puts a real run near
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# 67s, that is the datum to revisit the org figure with.
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#
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# Those figures predate tests hashing the admin password at 1 MB instead of
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# 64 MB (https://git.eeqj.de/sneak/webhooker/pulls/404). After that change, in
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# a cache-defeated build at host load 44-109 (2026-10-02), internal/handlers
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# took 8.5s and the slowest package was internal/database at 15.8s.
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#
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# -p 4 -parallel 8 keep the run under 2 GB of memory: at most four test
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# binaries build or run at once, each with at most eight parallel tests. Under
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# -race every test binary and every link costs a few hundred MB, so the
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